By this stage, Ellis had at his command 300 Europeans and 2,500 sepoys. On 23 June, the anniversary of Plassey, Surgeon Anderson of the Patna factory wrote in his diary, ‘The gentlemen of the factory learned that a strong detachment of [the Wolf’s] horse and sepoys were on the march to Patna, so that a war seemed inevitable. They thought it best to strike the first stroke, by possessing themselves of the city of Patna.’