Shashanka (Bengali: শশাঙ্কShôshangko) is often attributed with creating the first separate political entity in a unified Bengal called Gauda and as such is a major figure in Bengali history. He reigned in 7th century AD, and some historians place his rule approximately between 590 AD and 625 AD. He is the contemporary of Harshavardana and Bhaskar Varman of Kamarupa. His capital was called Karnasuvarna (কর্ণসুবর্ণ Kôrnoshubôrno or কানসোনা Kanshona) and is located in modern Murshidabad. The development of the Bengali calendar is also often attributed to Shashanka as the starting date falls squarely within his reign.
While Shashanka was known and referred to as the Lord of Gauda, his kingdom included more than just the region of Gauda. By the end of his reign, his domain stretched from Vanga to Bhuvanesha while in the east, his kingdom bordered Kamarupa. Prior to Shashanka, Bengal was divided into three regions, Banga, Samatata and Gauda and was ruled by a feeble ruler belonging to the later Gupta dynasty, Mahasengupta. Shashanka was one of his chieftains who rose to power taking the advantage of the weak ruler. After the death of Mahasengupta, Shashanka drove the later Guptas and other prominent nobles out of the ground to establish his own kingdom Gauda with the capital Karnasubarna.
There are several major contemporary sources of information on his life, including copperplates from his vassal Madhavavarma (King of Ganjam), copperplates of his rivals Harshavardhana and Bhaskaravarman, and the accounts of the Chinese monk Xuanzang as well as coins minted in Shashanka's reign. Bāṇabhaṭṭa and Xuanzang described Sasanka as the "vile Gauda serpent," and elaborated that Shashanka has destroyed the Buddhist stupas of Bengal and declared an award of hundred gold coins for the head of every Buddhist monk in his kingdom. However Ramesh Chandra Majumdar attempted to acquit Shashanka and the Brahmins of his reign of such deeds due to the fact that Xuanzang and Bāṇabhaṭṭa were patronised by Shashanka's enemy, Harsha, and that Xuanzang was a Buddhist. Despite this, the only evidence we have for the justification of conflict between Shashanka and Harsha is Xuanzang, who explained that Harsha's campaign against Shashanka was to "raise Buddhism from the ruin into which it had been brough by the king of Karnasuvarna" and to Shahanka wished to replaced Buddhism with Shaivism. As such, Radhagovinda Basak claims that there is no reason not to believe that Shashanka carried out a violent anti-Buddhist persecution. The authority of Majumdar's doubt is further called into question in his denial of the anti-Buddhist persecutions reported in the last chapter of the Mañjuśrīmūlakalpa, which Kashi Prasad Jayaswal had deemed to indicate a serious attempt by Shashanka to destroy Buddhism in the spirit of "orthodox revivalism," when he wrote that it is "unsafe to accept the statements recorded in this book as historical," and his minimization of the Sena persecutions of Buddhists.
Shashanka and his allies fought a major war with the then Emperor of Thanesar, Harshavardhana, and his allies. The result of the battle was inconclusive as Shashanka is documented to have retained dominion over his lands. The king of Malwa, Devgupta had an enmity with the ruler of Kannauj, Grahavarman who was also the brother-in-law of the Vardhan princes, by his marriage with the princess of Thanesar, Rajyashri. Devgupta attacked Kannauj and killed Grahavarman in the battle and imprisoned his wife Rajyashri. Hearing the news Prabhakarvardhan, the king of Thaneswar dies of shock and his elder son Rajyavardhan is crowned as the king. Rajyavardhan immediately marched towards Kannauj to avenge the death of his brother-in-law. The battle was followed by sudden assassination of Rajyavardhan. Though very conclusive proofs are not found, but a treachery is suspected on the part of Sasanka who joined the battle as an ally of Devgupta. Only source available in this matter is the "Harshacharita" by Banabhatta, who was a childhood friend and constant companion of Emperor Harsha. But one thing should be kept in mind that neither Bana nor Harsha were present at the site.
Harsha-Vardhan, then was crowned the ruler of Thaneswar and he once again gathered the army and attacked Kannauj. Though the results are not known clearly, but it is evident that Devgupta and Shashanka had to retreat from Kannauj. Shashanka continued to rule Gauda with frequent attacks from Harsha which he is known to have faced bravely.
Following his death, Shashanka was succeeded by his son, Manava, who ruled the kingdom for 8 months. However Gauda was soon divided amongst Harshavardhana and Bhaskarvarmana of Kamroop, the latter even managing to conquer Karnasuvarna.
R. C. Majumdar, History of Bengal, Dacca, 1943, pp 58–68
Sudhir R Das, Rajbadidanga, Calcutta, 1962
R. C. Majumdar, History of Ancient Bengal, Calcutta, 1971
P. K. Bhattacharyya, Two Interesting Coins of Shashanka, Journal of the Royal Asiatic Society of Great Britain & Ireland, London, 2, 1979
^Majumdar, Ramesh Chandra (1943). History of Bengal. Dacca: University of Dacca. p. 73-74.
^Sharma, Baijnath (1970). Harṣa and His Times. Sushma Prakashan. p. 157.
^Basak, Radhagovinda (1967). The History of North-Eastern India Extending from the Foundation of the Gupta Empire to the Rise of the Pala Dynasty of Bengal (c. A.D. 320-760). Sambodhi Publications. p. 134.
^Jayaswal, Kashi Prasad (1937). History of India. Lahore. p. 51.
^Majumdar, Ramesh Chandra (1943). History of Bengal. Dacca: University of Dacca. p. 64.