Nana Sahib was the adopted heir to Baji Rao II, the former peshwa of the Maratha Confederacy. The East India Company had decided that the pension and honours of the lineage would not be passed on to Nana Sahib, as he was not a natural born heir. Nana Sahib had sent his envoy Dewan Azimullah Khan to London, to petition the Queen against the Company's decision, but failed to evoke a favourable response. In May 1857, Nana Sahib arrived in Cawnpore with 300 soldiers, stating that he intended to support the British: Wheeler asked him to take charge of the government treasury in the Nawabganj area.