The Siege of Port Hudson occurred from May 21 to July 9, 1863, when Union Army troops assaulted and then surrounded the Mississippi River town of Port Hudson, Louisiana, during the American Civil War. In cooperation with Maj. Gen. Ulysses S. Grant's offensive against Vicksburg, Mississippi, Union Maj. Gen. Nathaniel P. Banks's army moved against the Confederate stronghold at Port Hudson on the Mississippi River. On May 27, 1863, after their...