The Battle of Aong took place on July 15, 1857, during the Indian rebellion of 1857, between the East India Company forces and Nana Sahib's forces. The East India Company forces under the command of General Sir Henry Havelock were advancing to Kanpur (Cawnpore), which had been besieged by Nana Sahib, supported by the rebel Company sepoys. Nana Sahib had earlier sent an army to check the advance of General Havelock to Kanpur, but it was defeated by Havelock's forces at Fatehpur on July 12. Nana Sahib then sent another force under the command of his brother, Bala Rao.