[2][3] Following a war of succession, Gajpati, his mother and his brother, Bairi Sal were banished and Shivram Singh became the ruler of Bhojpur.
[4][1] The Ujjainiyas under the leadership of Raja Gajpati helped Sher Shah Suri in the battle of Surajgarha against the Bengal sultanate who at the time were a major regional power.
General Ibrahim Khan was killed by Raja Gajpati and all the camp equipment, elephants and artillery pieces of the Bengal army fell into the hands of Ujjainiyas.
[4][5] Following the battle, Gajpati was embroiled in another familial feud with Birbhan of Arail who requested Emperor Humayun in gaining the throne of Bhojpur in 1538.
Gajpati in turn, after being dispossessed from his dominion, joined Sher Shah Suri and possibly took a leading role in the Battle of Chausa.