Few wars in the ancient world are remembered as much for their aftermath as for their conduct. The Kalinga War is one of them. Fought around 261–260 BCE between the Mauryan emperor Ashoka and the kingdom of Kalinga on the eastern coast of India, it was by all accounts a war of exceptional violence. What makes it unique, however, is not its scale but the response of the victor. In a remarkable inscription engraved on rocks across his empire, Ashoka himself recorded the number of people killed and deported, confessed his deep remorse at the suffering he had caused, and declared that he now sought conquest only through dhamma, righteousness, rather than through arms. It is often said that this is the only known instance in ancient history in which a victorious ruler publicly expressed regret for a war of conquest. (Ananta IAS: Kalinga War)
For the history of Odisha, the Kalinga War is a defining moment. It is the first event in the region’s history that can be dated with reasonable precision and documented by contemporary written evidence. It ended Kalinga’s existence as an independent kingdom, at least for a time, and brought it into the political, administrative and cultural world of the Mauryan empire. Through Ashoka’s Separate Edicts at Dhauli and Jaugada, it also produced some of the earliest written documents ever inscribed on Odishan soil. For the history of India and of the world, the war is significant as the turning point in the reign of one of history’s most remarkable rulers. Ashoka’s subsequent policy of dhamma, his patronage of Buddhism and his ideals of moral kingship have exercised an influence far beyond his own time and place.
The Kalinga War is also, however, a subject that calls for careful and critical study. Our knowledge of it depends almost entirely on the testimony of the victor, and that testimony was composed for particular purposes. Its causes are nowhere directly stated. Its course and battlefield are unknown except through later tradition. And its significance has been interpreted in very different ways by successive generations of historians. This article seeks to set out what can be known about the war from the available evidence, to analyse its causes and results, and to introduce the principal debates that continue to surround it.
Table of Contents
1. The Sources for the Kalinga War
The evidence for the Kalinga War is both unusually direct and unusually limited. It is direct because the principal source was composed by the victorious king himself within a few years of the event. It is limited because that source tells us very little about the war itself, and because no account from the Kalingan side survives.
Rock Edict XIII
The fundamental source is Ashoka’s Major Rock Edict XIII, engraved as part of the series of fourteen Major Rock Edicts at sites across the empire. It is preserved, in whole or in part, at Shahbazgarhi and Mansehra in present-day Pakistan, at Kalsi in Uttarakhand, at Girnar in Gujarat and at Erragudi in Andhra Pradesh, among other places. Part of it also survives in a Greek version at Kandahar in Afghanistan. (Puratattva: Kandahar Greek inscription) The edict states that the Kalingas were conquered when the king had been consecrated eight years. It records that 150,000 people were deported from Kalinga, that 100,000 were killed there, and that many times that number died. It describes how, directly after the annexation of Kalinga, the king turned to the zealous practice and teaching of dhamma. It also expresses his profound remorse (anusochana) at the conquest, explaining that the killing, death and deportation of people in the conquest of an unconquered country is deeply painful to him. He is especially grieved by the suffering it brings to Brahmins, ascetics (shramanas) and householders who practise virtue, and to their friends and relatives. Ashoka declares that even a hundredth or a thousandth part of that suffering would now be regrettable to him. He goes on to proclaim that the chief conquest is the conquest by dhamma (dhamma-vijaya), which he claims to have achieved both within his empire and among the Hellenistic kingdoms of the west. (Puratattva: Rock Edict XIII, translation by V.A. Smith; History of Odisha: The 13th Major Rock Edict)
Rock Edict XIII is an extraordinary document, but its character must be understood. It is not a military report. It provides no information about the causes of the war, the course of the campaign, the battles fought, the leaders on either side or the location of the fighting. It is a statement of royal ideology, composed several years after the war, whose purpose was to explain the king’s change of policy and to commend dhamma to his subjects and neighbours. Its casualty figures are the king’s own and cannot be independently verified. They may have been rounded or exaggerated. At the same time, it is striking that a ruler should have chosen to publicise, rather than conceal, the human cost of his own victory.
The Separate Kalinga Edicts
A second key source consists of the two Separate Kalinga Edicts engraved at Dhauli near Bhubaneswar and Jaugada in Ganjam district. At these two sites, within the conquered territory itself, Rock Edicts XI, XII and XIII were omitted from the series and replaced by these two special edicts. They are addressed to the officers (mahamatras) at Tosali and Samapa. They contain no explicit account of the war, but they reveal how Ashoka sought to govern Kalinga after its conquest, with a strong emphasis on justice, the avoidance of unjust imprisonment and torture, and the winning of the confidence of the people and of the frontier communities. (Orissa Review, Jan 2007; Puratattva: Kalinga Edict I) The deliberate omission of Rock Edict XIII from the Kalinga versions is itself a significant piece of evidence, discussed further below.
Other sources
Other sources provide context rather than direct evidence. The account of Pliny the Elder, drawing on Megasthenes, describes the Kalinga king as maintaining a standing force of 60,000 foot soldiers, 1,000 cavalry and 700 elephants. This testifies to Kalinga’s military strength before its conquest. (Mittal, An Early History of Orissa, quoting Pliny) The Hathigumpha inscription of Kharavela, composed perhaps two centuries later, does not mention Ashoka or the war. It does, however, refer to Nanda rule in Kalinga and documents the revival of Kalinga as a major power. The Buddhist legends of Ashoka preserved in Sri Lankan chronicles and the north Indian Ashokavadana describe his conversion and patronage of Buddhism, but they do not dwell on the Kalinga War. Archaeology, especially at Sisupalgarh, Dhauli and Jaugada, illuminates the urban and administrative setting of Mauryan Kalinga, though it has not yet produced direct evidence of the war itself.
The historian of the Kalinga War is thus in an unusual position. There is a precise contemporary statement of the war’s outcome and of its emotional and ideological meaning for the victor, but almost nothing about how it began, how it was fought, or how the people of Kalinga experienced it. Any account of its causes and course must therefore rely heavily on inference from the wider historical context.
2. Background: Kalinga and the Mauryan Empire
Kalinga before the war
In the 4th and 3rd centuries BCE, Kalinga was a well-established kingdom occupying the fertile coastal plain of present-day Odisha and extending southwards into what is now northern Andhra Pradesh. Its heartland was the delta of the Mahanadi and the coastal tract to the south, a region of rich rice-growing land watered by great rivers and by the monsoon. Archaeology shows that by this period the region possessed large fortified settlements. The most important was Sisupalgarh near Bhubaneswar, whose earliest deposits go back to the 6th–7th centuries BCE and which grew into a planned city with massive ramparts. (Wikipedia: Sisupalgarh) Kalinga’s long coastline and its river mouths sheltered ports, such as Palur in Ganjam, that were already active by the 4th–3rd century BCE. (Buddhistdoor) Its forests supplied elephants, timber and other valuable products, and Kautilya’s Arthashastra rated the elephants of Kalinga among the best in India.
Kalinga had not always been independent. The Hathigumpha inscription of Kharavela refers to a canal opened by a Nanda king and to a Jain image carried away from Kalinga by a Nanda ruler. Both suggest that the region had been conquered by the Nandas of Magadha in the 4th century BCE. It seems to have regained its independence during the decline of the Nandas or the transition to Mauryan rule, and it remained outside the Mauryan empire under Chandragupta and Bindusara. Megasthenes, as transmitted by Pliny, describes the king of the Calingae, with his royal city of Parthalis, as commanding 60,000 foot soldiers, 1,000 cavalry and 700 war elephants, always kept ready for war. (Mittal, An Early History of Orissa, quoting Pliny) If this information reflects conditions around 300 BCE, as is generally assumed, Kalinga was by Ashoka’s time a prosperous and militarily formidable state, one of the few significant powers in the subcontinent that lay outside Mauryan control.
The Mauryan empire on the eve of the war
The Mauryan empire was founded by Chandragupta Maurya (c. 321–297 BCE), who overthrew the Nandas of Magadha and built an empire stretching from the north-west frontier, where he acquired territories from the Seleucid ruler Seleucus Nicator, across the Gangetic plain and into central and western India. His son Bindusara (c. 297–273 BCE) appears to have extended Mauryan power into the Deccan and the south. By the time Ashoka came to the throne around 268 BCE, after what Buddhist tradition describes as a disputed succession, the empire embraced most of the subcontinent, from Afghanistan to Karnataka. The distribution of Ashoka’s own inscriptions confirms this vast extent. Kalinga, however, remained unconquered. Ashoka himself describes it in Rock Edict XIII as a previously unconquered country, and it lay as an independent enclave on the eastern seaboard between the Mauryan heartland in Magadha and the Mauryan territories in the Deccan and the south.
The young emperor’s early years on the throne are poorly documented. Later Buddhist legends portray him before his conversion as “Chandashoka” (“Ashoka the fierce”), a cruel and violent ruler, in contrast with the pious “Dharmashoka” of his later years. These legends were composed long afterwards to dramatise his conversion and cannot be taken as reliable history. Nevertheless, the decision to invade Kalinga in the eighth year after his consecration shows that, at this stage of his reign, Ashoka was still pursuing the expansionist policies of his predecessors.
3. The Causes of the Kalinga War
No ancient source states why Ashoka invaded Kalinga. Rock Edict XIII records the conquest and its consequences but says nothing about its motives. The causes of the war must therefore be inferred from the historical context, and historians have proposed a range of explanations. These are best seen as complementary rather than mutually exclusive, since major wars rarely have a single cause.
1. Political: the completion of imperial unification
The most fundamental cause was probably the logic of Mauryan imperial expansion. Under Chandragupta and Bindusara, the Mauryas had brought most of the subcontinent under their rule. An independent Kalinga, strong and prosperous, represented an anomaly within this imperial order and an obstacle to the completion of Mauryan supremacy. For a ruler steeped in the traditions of statecraft associated with Kautilya’s Arthashastra, which regards the conquest of neighbouring kingdoms as a normal goal of kingship, the subjugation of Kalinga would have appeared a natural and legitimate objective. The memory of earlier Nanda rule over Kalinga may also have encouraged Magadhan rulers to regard the region as rightfully belonging to the empire.
2. Strategic: control of the eastern routes
Kalinga’s geographical position gave it great strategic importance. It commanded the coastal corridor between the Gangetic plain and the Deccan and the south, the natural land route along the eastern seaboard. As long as Kalinga remained independent, communications between Magadha and the Mauryan territories in the south had to pass either through or around a potentially hostile kingdom. The routes inland, through the forests of central India, were long and difficult. Kalinga also controlled the lower Mahanadi valley, the gateway from the coast into the interior. The conquest of Kalinga would secure the empire’s eastern flank and integrate its northern and southern territories.
3. Economic: ports, trade and resources
Kalinga’s wealth made it a tempting prize. Its fertile deltaic lands could yield large agricultural revenues. Its ports gave access to maritime trade along the coast and across the Bay of Bengal to Sri Lanka and Southeast Asia, and its forests supplied elephants, ivory, timber and other valuable commodities. Many historians have argued that the Mauryan state, with its large army and bureaucracy, had strong economic incentives to bring these resources under its control. The control of trade routes and ports, both overland and maritime, is frequently cited as a major motive for the war. (History of Odisha: Kalinga War)
4. Military: the threat of a powerful neighbour
The military strength attributed to Kalinga by Megasthenes suggests that it was not a minor principality but a significant military power, situated close to the Mauryan heartland. A kingdom with a large standing army and hundreds of war elephants on the empire’s eastern border could be seen as a potential threat. It might also become a rallying point for opposition to Mauryan rule. Pre-emptive conquest may thus have been regarded as a means of securing the empire.
5. Personal and ideological factors
Some historians have also emphasised the personal ambition of the young emperor, who may have sought to establish his authority and prestige through a major military victory early in his reign, perhaps after a contested succession. Others have suggested more specific triggers, such as diplomatic or military provocations by Kalinga. However, there is no reliable evidence for any such incident, and accounts that describe particular provocations should be treated as speculative.
Assessment
The causes of the Kalinga War are best understood as a combination of these factors: the imperial drive to complete the unification of the subcontinent, the strategic need to control the eastern routes, the economic attraction of Kalinga’s lands, ports and resources, and the perceived threat posed by a powerful independent neighbour. What is notable is that, according to Ashoka’s own account, the war was fought against a people who had not previously been conquered. Its very success, and the scale of the resistance it encountered, produced a crisis of conscience that would transform the conqueror’s policy. As Nayanjot Lahiri has observed, the scale of the casualties suggests that there must have been very strong resistance to Ashoka’s takeover of Kalinga. (Ashoka University interview with Nayanjot Lahiri)
4. Date, Course and Battlefield
The date of the war
Rock Edict XIII states that Kalinga was conquered when Ashoka had been consecrated for eight years. The absolute date of the war therefore depends on the date of Ashoka’s consecration. That date is itself established indirectly, chiefly from a synchronism in the same edict: it names five Hellenistic kings among whom Ashoka claims to have achieved conquest by dhamma. These kings, Antiochus II of Syria, Ptolemy II of Egypt, Antigonus Gonatas of Macedonia, Magas of Cyrene and Alexander (of Epirus or Corinth), were all alive together only for a short period in the mid-3rd century BCE. This provides an approximate date for the composition of the edict, and hence for Ashoka’s regnal years. On this basis most historians place the Kalinga War around 261–260 BCE, although slightly different dates, such as c. 265 or 262 BCE, are also found in the literature. (Wikipedia: Kalinga War; The Wire: excerpt from Nayanjot Lahiri, Ashoka in Ancient India)
The course of the campaign
Of the actual course of the war almost nothing is known. Rock Edict XIII refers to slaughter, death and deportation “there”, in Kalinga, but gives no account of battles, sieges, commanders or the duration of the campaign. Modern accounts that describe the Mauryan army attacking from several directions, or the decisive battle being fought at a particular place, rest on inference or later tradition rather than on contemporary evidence. It is reasonable to suppose that the Mauryan forces advanced along the coastal corridor from the north, and perhaps also from the west through the Mahanadi valley or from the south through Mauryan territory in Andhra. The scale of the casualties suggests prolonged and determined resistance, possibly including the siege of fortified cities such as Sisupalgarh, and severe suffering among the civilian population, as Ashoka’s reference to the deaths of householders, ascetics and their families implies.
The battlefield tradition: Dhauli and the Daya river
Popular tradition in Odisha locates the decisive battle of the Kalinga War on the plain around Dhauli hill, on the banks of the Daya river, a few kilometres south of Bhubaneswar. According to a well-known story, the waters of the Daya ran red with the blood of the slain, and it was the sight of this carnage that moved Ashoka to remorse. The tradition draws strength from the presence at Dhauli of Ashoka’s Separate Edicts and the rock-cut elephant, and from the proximity of Sisupalgarh, often identified with the Mauryan provincial capital Tosali. Today Dhauli is marked by the Shanti Stupa (Peace Pagoda), built in the early 1970s with Japanese Buddhist support, which commemorates the war and Ashoka’s turn to peace.
The historian must nevertheless distinguish between tradition and evidence. No ancient source names Dhauli or the Daya as the site of the battle, and the story of the river running red is not attested in the early sources. The Dhauli edicts were engraved several years after the war at the seat of the provincial administration. Their location reflects administrative rather than military geography. Dhauli remains a plausible candidate for one of the principal theatres of the war, given its proximity to the heart of ancient Kalinga, but the precise site or sites of the fighting are unknown.
5. Immediate Results: Casualties, Annexation and Administration
The human cost
The most immediate result of the war was a catastrophe for the people of Kalinga. According to Rock Edict XIII, 150,000 people were deported, 100,000 were killed, and many times that number died, presumably of wounds, famine, disease and the general disruption caused by war. (Puratattva: Rock Edict XIII, translation by V.A. Smith) Whether these figures are precise, rounded or exaggerated cannot be determined. Some scholars have suggested that they were inflated for rhetorical effect, while others note that a king seeking to express remorse had little reason to magnify the scale of his own guilt. Even allowing for uncertainty, the figures indicate destruction on a scale that would have devastated a kingdom of Kalinga’s size.
The fate of the 150,000 deportees is not recorded. Many historians have suggested that they were resettled in other parts of the empire, perhaps to clear forest and bring new land under cultivation, in line with the policies of state-directed settlement described in the Arthashastra. This suggestion is plausible, but it remains an inference. What is clear from Ashoka’s own words is that the war brought suffering not only to soldiers but to the wider society of Kalinga, including Brahmins, ascetics and householders, and to their relatives and friends who survived.
Annexation and the province of Kalinga
Politically, the war ended Kalinga’s independence and brought it into the Mauryan empire as a province. The Separate Edicts at Dhauli and Jaugada show that the province was governed from Tosali, the seat of a kumara (prince-viceroy), with a second administrative centre at Samapa. Both were staffed by mahamatras and judicial officers of the city (nagala-viyohalaka). (Puratattva: Kalinga Edict I) The status of Tosali as a princely seat, comparable to Ujjayini and Takshashila, indicates the importance that the Mauryan state attached to its new province.
Governing a conquered people
The Separate Edicts offer a rare glimpse of how a conquering empire sought to govern a newly subdued and probably resentful population. In the first Separate Edict, Ashoka urges his officers to treat the people as his children and to avoid unjust imprisonment and harsh punishment. He orders the edict to be read publicly at regular intervals, and he announces that inspecting officers will be sent on tour every five years to ensure that justice is done. The second Separate Edict addresses the unconquered peoples of the frontier, including the forest peoples (atavikas), assuring them of the king’s goodwill while reminding them of his power. (Orissa Review, Jan 2007)
The omission of Rock Edict XIII from the Kalinga versions of the Major Rock Edicts is particularly revealing. The edict that most fully expressed Ashoka’s remorse for the conquest of Kalinga was, paradoxically, not displayed in Kalinga itself. Most scholars interpret this as a deliberate choice: a public reminder of the slaughter and deportations might have reopened wounds and provoked resentment among the conquered population. Nayanjot Lahiri has suggested that the choice reflects a degree of alienation in Kalinga, to which Ashoka responded with discreet reticence. The changed message of the Kalinga edicts, with their stress on solidarity between ruler and administration, was shaped by political conditions specific to the province. (The Wire: excerpt from Lahiri, Ashoka in Ancient India)
6. Long-Term Results
The long-term consequences of the Kalinga War extended far beyond Kalinga itself. They transformed the character of Ashoka’s reign, influenced the history of Buddhism across Asia, and left a lasting imprint on Indian political thought and on the historical identity of Odisha.
Ashoka’s transformation and the policy of dhamma
The most celebrated result of the war was the transformation of Ashoka’s policy and outlook. In Rock Edict XIII he states that directly after the annexation of Kalinga he began the zealous practice, love and teaching of dhamma, and that the remorse caused by the conquest had turned his mind away from conquest by force. He declares that the chief conquest is now the conquest by dhamma (dhamma-vijaya), and he urges his descendants not to think new conquests by arms worth making. If they do conquer, they should prefer patience and light punishment. (Puratattva: Rock Edict XIII) Elsewhere in his inscriptions Ashoka speaks of replacing the sound of the war drum with the sound of dhamma.
Ashoka’s dhamma was not a sectarian creed but a moral code of conduct. It emphasised respect for parents and elders, generosity towards Brahmins and ascetics, kindness towards servants and slaves, non-injury to living beings, moderation in spending and possessions, and tolerance and mutual respect among religious sects. To promote it, Ashoka engraved his edicts on rocks and pillars throughout the empire. He undertook tours of dhamma (dhamma-yatra), and he appointed special officers, the dhamma-mahamatras, to oversee its propagation and the welfare of the people. He also initiated public works, such as wells, rest houses, shade trees and medical facilities for humans and animals. Ashoka never again launched a war of conquest. The Kalinga War marks the end of the great age of Mauryan territorial expansion, and the beginning of a long period of relative internal peace that lasted for the remaining decades of his reign. (Wikipedia: Kalinga War)
The pragmatic limits of non-violence
It would be a mistake, however, to imagine that Ashoka became an absolute pacifist or dismantled the coercive apparatus of the state. In the same Rock Edict XIII that expresses his remorse, he warns the forest peoples that, although he now prefers forgiveness, he retains the power to punish them, and he asks them to repent lest they be killed. He also retained capital punishment, though he decreed a period of respite for condemned prisoners. As Upinder Singh has argued, Ashoka recognised the pragmatic limits of non-violence in the political sphere, just as Kautilya recognised the pragmatic limits of violence. (University of Hyderabad Herald: report of Upinder Singh’s lecture) The transformation that followed the Kalinga War was thus real and profound, but it operated within the constraints of imperial rule.
Ashoka and Buddhism
The Kalinga War is traditionally associated with Ashoka’s embrace of Buddhism. Ashoka’s own Minor Rock Edicts state that he had been a lay follower (upasaka) of the Buddha for some time before he became more zealous and drew closer to the Buddhist monastic order (sangha). His Rock Edict VIII records that ten years after his consecration he visited Sambodhi, the site of the Buddha’s enlightenment at Bodh Gaya. These statements suggest that his association with Buddhism may have begun before or around the time of the war, and that the war intensified rather than initiated his commitment. Whatever the precise sequence, Ashoka’s patronage made him the most important royal supporter of early Buddhism. Buddhist tradition credits him with sponsoring a council of the sangha and with sending missionaries to many lands, including Sri Lanka, where his son Mahinda and daughter Sanghamitta are said to have established Buddhism. The spread of Buddhism across South and Southeast Asia owes much to the impetus given by Ashoka. In this sense, the consequences of the Kalinga War have reached far beyond India.
Kalinga after the Mauryas
For Kalinga itself, Mauryan rule appears to have lasted only a few decades. After Ashoka’s death around 232 BCE, the Mauryan empire declined rapidly, and Kalinga regained its independence. By the 1st century BCE it had re-emerged as a major power under Kharavela of the Mahameghavahana dynasty, whose Hathigumpha inscription records his campaigns against Magadha and other kingdoms. Notably, the inscription celebrates the recovery from Magadha of the Kalinga Jina image carried off by a Nanda king, but it makes no mention of Ashoka or the Kalinga War. This silence has been variously interpreted, as reflecting either the passage of time or a deliberate avoidance of a painful memory. Kharavela’s revival nonetheless shows that the war, devastating as it was, did not permanently destroy Kalinga as a political and cultural entity.
The war also left a lasting mark on the cultural landscape of Odisha. Buddhism took root in the region and flourished for many centuries, as the great monastic sites of Ratnagiri, Lalitgiri and Udayagiri attest. In modern times, the Kalinga War has become a central element of Odia historical memory. It is often remembered with pride in the resistance of the Kalingan people and with a sense of their sacrifice. Dhauli, with its edicts, its rock-cut elephant and its modern Peace Pagoda, has become a place of pilgrimage and reflection, and the annual Dhauli Mahotsav celebrates the region’s heritage.
7. Historiographical Debates and Reassessments
The Kalinga War has been interpreted in very different ways since Ashoka’s inscriptions were first deciphered in the 19th century. Several questions continue to be debated.
Sincerity or political ideology?
The traditional view, shaped by the moving language of Rock Edict XIII, sees Ashoka’s remorse as a genuine moral conversion. On this reading, it was a rare instance of a ruler learning from the horrors of war. More recent scholarship has emphasised that the edicts are also political documents, composed to legitimise the king’s rule and to shape the conduct of officials and subjects. Upinder Singh, in Political Violence in Ancient India (Harvard University Press, 2017), situates Ashoka within a broader history of state violence in South Asia. She argues that a peaceful state never existed in the region, and suggests that some of Ashoka’s texts can be read as political propaganda by a ruler seeking support from institutions such as the Buddhist sangha. (New York Review of Books: review of Upinder Singh, Political Violence in Ancient India) These perspectives need not deny the sincerity of Ashoka’s remorse. They do, however, insist that it be understood within its political context.
Did the war cause Ashoka’s conversion?
Popular accounts often present the Kalinga War as the direct cause of Ashoka’s conversion to Buddhism. Ashoka’s own inscriptions present a more complex picture. Rock Edict XIII attributes his zeal for dhamma to the aftermath of the war. His Minor Rock Edicts, however, indicate that he had been a lay Buddhist for a period before becoming more committed. Historians therefore debate whether the war initiated, accelerated or merely coincided with his religious transformation. Most now see it as a decisive catalyst within a longer process.
The reliability of the casualty figures
The figures given in Rock Edict XIII, with 100,000 killed, 150,000 deported and many times that number dead, have been questioned. Some scholars regard them as conventional round numbers or rhetorical exaggerations designed to emphasise the scale of the king’s remorse. Local traditions in Odisha have sometimes held that the figures were inflated. Others argue that they are broadly credible for a major war against a populous and well-defended kingdom. In the absence of independent evidence, the question cannot be settled. It is significant, however, that the figures come from the victor rather than from a hostile source.
Kalinga’s perspective and regional memory
Because the only contemporary account comes from Ashoka, the perspective of the people of Kalinga is almost entirely absent from the historical record. In modern Odia historical writing and popular culture, there has been a strong tendency to recover this perspective. These accounts emphasise the bravery of the Kalingan resistance, the scale of Kalinga’s sacrifice, and the continuity of Kalingan identity through Kharavela and later periods. Some popular writings have gone further, making claims about Kalinga’s political constitution, the names of its leaders or the details of the battle, for which there is no reliable evidence. The research scholar should value the legitimate effort to recover the experience of the conquered, while distinguishing carefully between evidence-based reconstruction and later tradition.
The war in national and global memory
In modern India, Ashoka has been embraced as a symbol of the nation’s highest ideals. The lion capital of his pillar at Sarnath was adopted as the national emblem, and the dhamma-chakra appears on the national flag. The Kalinga War, as the turning point that produced his policy of dhamma, holds a central place in this national narrative. Globally, the war and its aftermath are frequently cited in discussions of ethics, leadership and the moral costs of war. This widespread use of the war as a moral symbol has sometimes encouraged simplified narratives. Recent scholarship, including Nayanjot Lahiri’s Ashoka in Ancient India (2015), has sought to recover a more historically grounded understanding of Ashoka and the Kalinga War, based on close reading of the edicts and on archaeology. (De Gruyter Brill: Nayanjot Lahiri, Ashoka in Ancient India)
Odia Historians on the Kalinga War
For historians from Odisha, the Kalinga War is not simply an episode in the life of Ashoka. It is a defining moment in their own region’s history, and Odia scholarship has consistently sought to view it from the standpoint of Kalinga rather than of Magadha. Several distinctive arguments have emerged from this tradition. They concern the background to the war, its causes, the political character of Kalinga, and the meaning of the war for later Odishan history.
Kalinga’s independence and the background to the war
Odia historians have generally accepted that Kalinga had been conquered by the Nandas before the Mauryas. N.K. Sahu, for example, used the Hathigumpha reference to a Nanda king’s canal, together with finds of punch-marked coins, to argue for a period of Nanda rule. (Gouri Shankar Tripathy, Odisha Review, Nov 2008) In this view, Kalinga regained its independence during the confusion surrounding the rise of Chandragupta Maurya and then rapidly grew into a rival centre of power in eastern India. That rivalry made eventual conflict with Magadha likely. Manmatha Nath Das, in Glimpses of Kalinga History (1949), emphasised the extraordinary resilience that Kalinga showed after the war. He described its revival under the Mahameghavahanas as a phenomenon in which the Kalingans rose again “from the depth of ruin” within a short time. (Live History India)
The causes of the war
Odia writers have tended to stress the aggressive character of the Mauryan invasion and the economic motives behind it. Gouri Shankar Tripathy, writing in the Odisha Review in 2008, argued that the one cause almost unanimously accepted by scholars is that the war was an act of aggression. In his view, Ashoka was a warlike prince who had come to the throne by eliminating rival claimants. His predecessors had conquered almost all of India except Kalinga, and the existence of Kalinga as an independent and developed country would have been an eyesore to an ambitious king. Tripathy also suggested that Ashoka’s greed may have been excited by the tremendous growth of Kalinga’s maritime trade at that time. (Tripathy, Odisha Review, Nov 2008) Tripathy went further than most scholars in questioning whether there had been any Nanda rule in Kalinga at all. He identified the Nandaraja of the Hathigumpha inscription with Ashoka himself, a view not widely shared.
Was Kalinga a monarchy or a republic?
A question frequently discussed in Odia historical writing is the political character of Kalinga at the time of the war. Because Rock Edict XIII names no king of Kalinga, some scholars have suggested that Kalinga was not a monarchy but a republic (gana), like the Vajji or Malla confederacies of northern India. Brajabandhu Mahanta, writing on the History of Odisha website, has argued against this view on several grounds. First, the ancient republics were small, city-centred states, whereas Kalinga extended over a vast territory from the Godavari to the Ganga delta and towards the Vindhyas, which would have required organised monarchical administration. Second, Kalinga had grown after the Nanda period into an alternative centre of power capable of rivalling Magadha in trade, commerce and politics, which a small republic could hardly have done. Third, Rock Edict XIII is not a eulogy celebrating Ashoka’s victory but a confession of remorse, so it had no reason to name the defeated king. Mahanta also points to the hostile and fanciful descriptions of peoples beyond the Vindhyas reported by Megasthenes as evidence of a long-standing rivalry between Magadha and Kalinga. His argument is reinforced by Pliny’s account, drawn from Megasthenes, which speaks of a king of the Calingae with a large standing army. (Brajabandhu Mahanta, “Nature of Kalinga State at the Time of Kalinga War”, History of Odisha) Most historians now accept that Kalinga was a monarchy, though the name of its king remains unknown.
The war in Odia historical memory
Odia historians have also played a leading part in shaping the memory of the war in modern Odisha. Their writing has emphasised the heroism of the Kalingan resistance, the scale of Kalinga’s sacrifice, and the continuity of Kalingan identity through the revival under Kharavela. It has also stressed the importance of Kalinga’s maritime and commercial power. This perspective has informed public commemoration at Dhauli and the wider regional consciousness of the war. The research scholar should value this effort to recover the perspective of the conquered. Arguments grounded in the sources, such as those concerning Kalinga’s political organisation, should nonetheless be distinguished from traditions, such as the reddening of the Daya river, that are not attested in early evidence.
| Historian | Work | Principal argument |
|---|---|---|
| Manmatha Nath Das | Glimpses of Kalinga History (1949) | Kalinga’s rapid revival “from the depth of ruin” after the war |
| N.K. Sahu | Utkal University History of Orissa, vol. 1 (1964) | Nanda rule over Kalinga before the Mauryas; Kalinga’s later independence |
| Gouri Shankar Tripathy | “Date Line of Kharavela the Great”, Odisha Review (2008) | War as Mauryan aggression driven by ambition and by Kalinga’s maritime wealth; Nandaraja = Ashoka |
| Brajabandhu Mahanta | “Nature of Kalinga State at the Time of Kalinga War”, History of Odisha | Kalinga was a monarchy, not a republic; RE XIII’s silence on the king explained by its confessional character |
| Dharmanarayan Das | The Early History of Kalinga (1977) | General study of early Kalinga used in later Odia writing |
Summary: Causes and Results at a Glance
| Aspect | Main points | Evidence |
|---|---|---|
| Political cause | Completion of Mauryan imperial unification; earlier Nanda claim to Kalinga | Inferred from context; Hathigumpha on Nanda rule |
| Strategic cause | Control of the eastern coastal corridor and the Mahanadi gateway | Inferred from geography and Mauryan expansion |
| Economic cause | Fertile land, ports, maritime trade, forest resources and elephants | Archaeology of ports; Arthashastra on Kalinga’s elephants |
| Military cause | Removal of a powerful independent neighbour | Pliny (from Megasthenes) on Kalinga’s army |
| Immediate result | 100,000 killed, 150,000 deported, many more dead | Rock Edict XIII |
| Political result | Kalinga annexed as a province, governed from Tosali and Samapa | Separate Kalinga Edicts |
| Policy result | Renunciation of further conquest; dhamma-vijaya; welfare measures | Rock Edict XIII and other edicts |
| Religious result | Intensified patronage of Buddhism and its spread across Asia | Ashokan edicts; Buddhist tradition |
| Long-term regional result | Kalinga’s later revival under Kharavela; lasting place in Odia memory | Hathigumpha inscription; modern tradition |
Chronological Outline
| Date (approximate) | Event |
|---|---|
| 4th century BCE | Nanda rule over Kalinga, implied by the Hathigumpha inscription |
| c. 321–297 BCE | Reign of Chandragupta Maurya; Kalinga remains independent; Megasthenes describes its army |
| c. 297–273 BCE | Reign of Bindusara; Mauryan expansion into the Deccan |
| c. 268 BCE | Accession of Ashoka |
| c. 261–260 BCE | Kalinga War, in the eighth year after Ashoka’s consecration |
| c. 260–256 BCE | Ashoka’s intensified commitment to dhamma and Buddhism; visit to Sambodhi |
| c. 256 BCE onwards | Engraving of the Major Rock Edicts, including Rock Edict XIII; Separate Edicts at Dhauli and Jaugada |
| c. 232 BCE | Death of Ashoka; decline of the Mauryan empire begins |
| c. 1st century BCE | Revival of Kalinga under Kharavela; Hathigumpha inscription |
Dates follow the standard chronology and remain approximate.
Conclusion
The Kalinga War was at once a conventional war of imperial conquest and an event of unique moral significance. Its causes lay in the logic of Mauryan expansion: the desire to complete the unification of the subcontinent, to control the strategic routes and rich resources of the eastern seaboard, and to eliminate a powerful independent neighbour. Its immediate results were catastrophic for Kalinga, which suffered death, deportation and the loss of its independence. Yet the war also produced something without parallel in the ancient world: a victor’s public confession of remorse, and a reorientation of imperial policy towards the ideals of dhamma, welfare and tolerance.
For the history of Odisha, the war marks the entry of the region into the light of written history and its incorporation, for a time, into the first pan-Indian empire. Kalinga’s subsequent revival under Kharavela, and the enduring place of the war in Odia memory, show that the conquered people were not erased by their defeat. For the history of India and the world, the war’s consequences, through Ashoka’s dhamma and his patronage of Buddhism, have reached across Asia and across the centuries. The research scholar must nevertheless approach the war with critical care. It must be read through the testimony of its victor, interpreted in its political context, and distinguished clearly from the legends and simplifications that have grown up around it.
Glossary of Technical Terms
| Term | Meaning |
|---|---|
| Dhamma (Sanskrit dharma) | Ashoka’s moral code of righteous conduct |
| Dhamma-vijaya | Conquest by righteousness, as opposed to conquest by arms |
| Dhamma-mahamatra | Officer appointed by Ashoka to propagate dhamma and oversee welfare |
| Dhamma-yatra | A royal tour undertaken to promote dhamma |
| Anusochana | Remorse, the term used in Rock Edict XIII |
| Mahamatra | Senior Mauryan officer |
| Kumara | Prince, here serving as provincial viceroy |
| Nagala-viyohalaka | City judicial officers, addressed in the Separate Kalinga Edict |
| Atavika | Forest people |
| Shramana | Ascetic, especially of non-Brahmanical traditions such as Buddhism and Jainism |
| Upasaka | Lay follower of the Buddha |
| Sangha | The Buddhist monastic order |
| Major Rock Edicts | A series of fourteen edicts engraved by Ashoka at sites across the empire |
| Separate Kalinga Edicts | Two special edicts found only at Dhauli and Jaugada |
Frequently Asked Questions (FAQ)
1. When was the Kalinga War fought? In the eighth year after Ashoka’s consecration, usually dated to around 261–260 BCE.
2. Who fought the Kalinga War? It was fought between the Mauryan emperor Ashoka and the independent kingdom of Kalinga, centred on coastal Odisha.
3. What were the main causes of the Kalinga War? The main causes were Mauryan imperial ambition, the strategic importance of Kalinga’s coastal routes, its wealth in land, ports and resources, and the threat posed by its powerful army. No ancient source states the causes directly.
4. How many people died in the Kalinga War? According to Ashoka’s Rock Edict XIII, 100,000 were killed, 150,000 deported and many times that number died.
5. Where was the Kalinga War fought? Tradition places the main battle near Dhauli on the Daya river, near Bhubaneswar, but no ancient source confirms the exact battlefield.
6. What were the results of the Kalinga War? Kalinga was annexed as a Mauryan province, and Ashoka, moved by remorse, renounced further wars of conquest and adopted the policy of dhamma. He also intensified his patronage of Buddhism.
7. Why is Rock Edict XIII not found in Kalinga? At Dhauli and Jaugada it was replaced by the Separate Kalinga Edicts. This was probably to avoid reminding the conquered people of the war’s horrors.
How to Cite This Article
History of Odisha. “Kalinga War: Causes and Results.” historyofodisha.com, 2026. https://historyofodisha.com/kalinga-war-causes-and-results/ (accessed [date]).
This article is a survey intended as a guide. For research, cite the edicts in their scholarly editions and the specialist studies listed below directly.
Sources and Further Reading
Web sources consulted
- Kalinga War — Wikipedia
- Rock Edict XIII, translation by V.A. Smith — Puratattva
- Kandahar Greek inscription (Rock Edicts XII–XIII) — Puratattva
- Kalinga Separate Edict I — Puratattva
- The 13th Major Rock Edict of Asoka — History of Odisha
- Kalinga War — History of Odisha
- Sisupalgarh — Wikipedia
- Ancient Buddhist Stupa Excavated at Palur — Buddhistdoor
- Pliny on Kalinga, in A.C. Mittal, An Early History of Orissa — JainQQ
- Kalinga War: Date, Causes, Ashoka’s Transformation — Ananta IAS
Journal articles, magazines and reviews
- “Jaugada: An Early Historical Fort”, Orissa Review, January 2007
- Excerpt from Nayanjot Lahiri, Ashoka in Ancient India: “The King and Kalinga” — The Wire
- Interview with Nayanjot Lahiri — Ashoka University
- Review of Upinder Singh, Political Violence in Ancient India — New York Review of Books, 2018
- Report of Upinder Singh’s lecture “Ashoka and Kautilya” — University of Hyderabad Herald
Standard books and editions
- E. Hultzsch, Inscriptions of Asoka, Corpus Inscriptionum Indicarum, vol. 1, new edition (Oxford, 1925)
- A. Cunningham, Inscriptions of Asoka, Corpus Inscriptionum Indicarum, vol. 1 (Calcutta, 1877)
- D.C. Sircar, Inscriptions of Asoka (New Delhi: Publications Division)
- Nayanjot Lahiri, Ashoka in Ancient India (Harvard University Press, 2015)
- Upinder Singh, Political Violence in Ancient India (Harvard University Press, 2017)
- Romila Thapar, Aśoka and the Decline of the Mauryas (Oxford University Press)
- V.A. Smith, Asoka: The Buddhist Emperor of India (Oxford, 1901)
- R.K. Mookerji, Asoka (London, 1928)
- Amar Chand Mittal, An Early History of Orissa (Jain Cultural Research Society)
- K.C. Panigrahi, History of Orissa (Hindu Period)
Works by Odia historians
- Manmatha Nath Das, Glimpses of Kalinga History (Calcutta, 1949)
- N.K. Sahu (ed.), History of Orissa, vol. 1 (Utkal University, 1964)
- Dharmanarayan Das, The Early History of Kalinga (Calcutta: Punthi Pustak, 1977)
- Gouri Shankar Tripathy, “Date Line of Kharavela the Great”, Odisha Review, November 2008
- Brajabandhu Mahanta, “Nature of Kalinga State at the Time of Kalinga War”, History of Odisha
- K.C. Panigrahi, History of Orissa (Hindu Period)
- H.K. Mahtab, History of Orissa