On May 14, 1863, the Battle of Jackson, which was part of the months long Vicksburg Campaign, was faught at Jackson, Mississippi after the Union victory at the Battle of Vicksburg. The Union Army, under the command of General Ulysses S. Grant, captured the Mississippi State Capital, including the Old State Capital Building where the the state secession vote was held, which forced the state legislature to move to the Lowndes County Courthouse.
Hamilton Historical Records 