<Li> Young's Point </Li> <Li> Goodrich's Landing </Li> <P> The Siege of Vicksburg (May 18--July 4, 1863) was the final major military action in the Vicksburg Campaign of the American Civil War . In a series of maneuvers, Union Maj. Gen. Ulysses S. Grant and his Army of the Tennessee crossed the Mississippi River and drove the Confederate Army of Mississippi, led by Lt. Gen. John C. Pemberton, into the defensive lines surrounding the fortress city of Vicksburg, Mississippi . </P> <P> Vicksburg was the last major Confederate stronghold on the Mississippi River; therefore, capturing it completed the second part of the Northern strategy, the Anaconda Plan . When two major assaults (May 19 and 22, 1863) against the Confederate fortifications were repulsed with heavy casualties, Grant decided to besiege the city beginning on May 25 . After holding out for more than forty days, with their reinforcement and supplies nearly gone, the garrison finally surrendered on July 4 . </P>

When did the battle of vicksburg start and end