Explanation:

The Battle of Koregaon was fought on 1 January 1818 between the British East India Company and the Peshwa faction of the Maratha Confederacy, at Koregaon Bhima. A 28,000-strong force led by Peshwa Baji Rao II whilst on their way to attack the company-held Pune, were unexpectedly met by an 800-strong Company force that was on its way to reinforce the British troops in Pune.