War and conflict characterised the Shunga period. They are known to have warred with the
Kalingas,
Satavahanas, the
Indo-Greeks, and possibly the
Panchalas and
Mathuras. The Shunga empire's wars with the Indo-Greek kingdom figure greatly in the history of this period. From around 180 BCE the
Greco-Bactrian ruler
Demetrius conquered the Kabul Valley and is theorised to have advanced into the trans-Indus to confront the Shungas.
Indian Museum,
Calcutta.
Literary evidence Several works, such as the
Mahabharata and the
Yuga Purana describe the conflict between the Shungas and the Indo-Greeks.
Military expeditions of the Shungas Scriptures such as the
Ashokavadana claim that Pushyamitra toppled Emperor
Brihadratha and killed many Buddhist monks. Then it describes how Pushyamitra sent an army to
Pataliputra and as far as Sakala (
Sialkot), in the
Punjab, to persecute Buddhist monks.
War with the Yavanas (Greeks) The
Indo-Greeks, called
Yavanas in Indian sources, either led by
Demetrius I or
Menander I, then invaded India, possibly receiving the help of Buddhists. Menander in particular is described as a convert to Buddhism in the
Milindapanha. The Hindu text of the
Yuga Purana, which describes Indian historical events in the form of a prophecy, relates the attack of the Indo-Greeks on the Shunga capital
Pataliputra, a magnificent fortified city with 570 towers and 64 gates according to
Megasthenes, and describes the impending war for city: However, the Yuga Purana indicates that the Yavanas (Indo-Greeks) did not remain for long in Pataliputra, as they were faced with a civil war in
Bactria. Western sources also suggest that this new offensive of the Greeks into India led them as far as the capital
Pataliputra:
Battle on the Sindhu river An account of a direct battle between the Greeks and the Shunga is also found in the
Mālavikāgnimitram, a play by
Kālidāsa which describes a battle between a squadron of Greek cavalrymen and
Vasumitra, the grandson of
Pushyamitra, accompanied by a hundred soldiers on the "Sindhu river", in which the Indians defeated a squadron of Greeks and Pushyamitra successfully completed the
Ashvamedha Yagna. This river may be the
Indus River in the northwest, but such expansion by the Shungas is unlikely, and it is more probable that the river mentioned in the text is the
Sindh River or the
Kali Sindh River in the
Ganges Basin.
Epigraphic and archaeological evidence Dhanadeva-Ayodhya inscription Ultimately, Shunga rule seems to have extended to the area of Ayodhya. Shunga inscriptions are known as far as
Ayodhya in northern central India;
Yavanarajya inscription '', dated to "year 116 of
Yavana hegemony", probably 70 or 69 BCE, was discovered in
Mathura.
Mathura Museum. The Greeks seem to have maintained control of Mathura. The
Yavanarajya inscription, also called the "Maghera inscription", discovered in
Mathura, suggests that the Indo-Greeks were in control of Mathura during the 1st century BCE. The inscription is important in that it mentions the date of its dedication as "The last day of year 116 of
Yavana hegemony (
Yavanarajya)". It is considered that this inscription is attesting the control of the
Indo-Greeks in the 2nd and 1st centuries BCE in Mathura, a fact that is also confirmed by numismatic and literary evidence. Later however, it seems the city of Mathura was retaken from them, if not by the Shungas themselves, then probably by other indigenous rulers such as the
Datta dynasty or the
Mitra dynasty, or more probably by the
Indo-Scythian Northern Satraps under
Rajuvula. In the region of Mathura, the
Arjunayanas and
Yaudheyas mention military victories on their coins ("Victory of the Arjunayanas", "Victory of the Yaudheyas"), and during the 1st century BCE, the
Trigartas,
Audumbaras and finally the
Kunindas also started to mint their own coins, thus affirming independence from the Indo-Greeks, although the style of their coins was often derived from that of the Indo-Greeks.
Heliodorus pillar was built in
Vidisha under the Shungas, at the instigation of
Heliodorus, ambassador of the
Indo-Greek king
Antialcidas. The pillar originally supported a statue of
Garuda. Established circa 100 BCE. Very little can be said with great certainty. However, what does appear clear is that the two realms appeared to have established normalised diplomatic relations in the succeeding reigns of their respective rulers. The Indo-Greeks and the Shungas seem to have reconciled and exchanged diplomatic missions around 110 BCE, as indicated by the
Heliodorus pillar, which records the dispatch of a Greek ambassador named
Heliodorus, from the court of the
Indo-Greek king
Antialcidas, to the court of the Shunga emperor
Bhagabhadra at the site of
Vidisha in central
India. ==Decline==