Maurya Empire
Historically reliable inscription details of Chandragupta's campaign against Nanda Empire are unavailable and but later written Buddhist, Jain, and Hindu texts which claim Magadha was ruled by the Nanda dynasty, which, with Chanakya's counsel, Chandragupta conquered Nanda Empire. The army of Chandragupta and Chanakya first conquered the Nanda outer territories, and finally besieged the Nanda capital Pataliputra. In contrast to the easy victory in Buddhist sources, the Hindu and Jain texts state that the campaign was bitterly fought because the Nanda dynasty had a powerful and well-trained army.