By splendid deception tactics.
He had to get his troops across to the East bank of the Mississippi, downstream from Vicksburg. But at the crossing-point, they would be highly vulnerable to attack from Confederate units.
So he ordered a cavalry raid down through the whole length of the state of Mississippi, to distract the attention of the garrison commander (Pemberton). This commander was indeed completely baffled as to what was going on, and did not realize that Grant had crossed the river until the operation was complete.
Grant was then in a favourable position to attack Vicksburg - greatly helped by the conflicting orders Pemberton was receiving, with his President urging him to hold Vicksburg at any cost, and his area commander, Joe Johnston, advising him to abandon the place and save his army.
After discovering that Vicksburg could not be carried by assault, Grant settled down to a siege, and Pemberton duly surrendered on a glorious Fourth of July.
The Union general commanding at Vicksburg was Ulysses S. Grant. The Confederates were led by Lieutenant General John C. Pemberton.
President Lincoln ordered General Ulysses S. Grantand his army to capture Vicksburg.
Because Grant pursued the Confederates back into their lines and starved them out.
Grant led the Army of the Tennessee.
Ulysses S. Grant won the siege of Vicksburg.
The Union general commanding at Vicksburg was Ulysses S. Grant. The Confederates were led by Lieutenant General John C. Pemberton.
Vicksburg.
President Lincoln ordered General Ulysses S. Grantand his army to capture Vicksburg.
Because Grant pursued the Confederates back into their lines and starved them out.
Ulysses S. Grant was the general who was responsible for taking the Mississippi River. During the Vicksburg Campaign, Grant gained control of the river, a major Confederate defeat. Grant and Confederate Lt. General Pemberton clashed in the Battle of Vicksburg.
Grant led the Army of the Tennessee.
Ulysses S. Grant won the siege of Vicksburg.
So many Confederates died, that the South could only fight a defensive war. Also at the same time, Gen Grant took Vicksburg and the North controlled the Misssissippi river. So the loss of Vicksburg and the defeat of the Confederates meant that Gen Grant would lead the Union Army to Victory, two years later.
Vicksburg
General Pemberton had his army defending Vicksbug. General Johnston had more troops oustide of Vicksburg and these threatened the Union with attack from the rear. Gen Grant may have thought he could take Vicksburg defenses by attacking from the river or from Port Hudson side. But he realized he had to lay a siege against Vicksburg. To do this, he had to defeat the forces that were outside of the city and surround the city. The Battle of Jackson(May 14) was fought to cut off re-inforcements from giving aid to the Confederates at Vicksburg. Then final battle occurred at Battle of Champion's Hill(May 16). This forced the Confederates back into the Vicksburg defenses. Link to a Map of Union advance: http://en.wikipedia.org/wiki/File:VicksburgCampaignAprilJuly63.png
In US Grant's first attempt to capture the most important city of Vicksburg, one of the obstacle he faced was "nature". His forces floundered in the swamps that surrounded the city. In the process, the Confederates had burned Grant's supply bases behind him and General William T. Sherman was defeated at Chicksaw Bluffs.
U.S. Grant