Corydon was the site of the only Civil War battle fought in Indiana. On July 9, 1863, Confederate cavalry led by Brigadier General John Hunt Morgan, and citizens of Brandenburg, Kentucky, crossed the Ohio River into Indiana. This became known as "Morgan's Raid". Morgan's 2,500 men were opposed by 400 hastily assembled home guard at the Battle of Corydon. The Union troops were quickly defeated and the town surrendered. Corydon was sacked in retaliation for Union looting in Kentucky. The town's treasury of $690 was seized, and prisoners in the jail were released. Morgan demanded from $600 to $700 from each mill and shop owner; otherwise their buildings would be burned. Tradition says one Corydon miller overpaid by $200; Morgan promptly returned it to him.