[2] He was initially reluctant to join the rebellion but agreed to do so on the insistence of his brother and the commander-in-chief, Hare Krishna Singh.
Babu Amar Singh originally assisted in his brothers campaign including the infamous Siege of Arrah.
Amar Singh was also planning to join his force with fellow rebel leader Nana Sahib.
[5] One 6 June 1858, Amar Singh and his force of 2000 sepoys and 500 sawars arrived in the village of Gahmar in Ghazipur near the border with Bihar.
In October 1859, after subsequent guerilla skirmishes with the British, Amar Singh fled with other rebel leaders to the Nepal Terai.