Confederate General Joseph Johnston had been in command of all Confederate troops in Mississippi, including those at Vicksburg, for less than a week when Ulysses Grant decided to attack Jackson, the state’s capital, before assaulting Vicksburg.
With only 12,000 troops Joseph Johnston had to abandon the city, evacuating critical supplies and withdrawing to the north. On Thursday, May 14, 1863 after overwhelming the two Confederate brigades left behind to affect a delaying action, Federal forces occupied Jackson.