Following the Union Army victory at the Battle of Shiloh on April 6–7, Maj.
Gen. Henry Halleck amassed three Union armies —the Army of the Tennessee, the Army of the Ohio, and the Army of the Mississippi— for an advance on the vital rail center of Corinth, Mississippi.
Made cautious by the staggering losses at Shiloh, Halleck embarked on a tedious campaign of offensive entrenchment, fortifying after each advance.
By May 25, 1862, after moving five miles in three weeks, Halleck was in position to lay siege to the town.
 Confederate morale was low and Beauregard was outnumbered two to one.
The water was bad.
Typhoid and dysentery had felled thousands of his men.
At a council of war, the Confederate officers concluded that they could not hold the railroad crossover.
Sickness had claimed the lives of almost as many men as the Confederacy had lost at Shiloh.
Following the Union Army victory at the Battle of Shiloh on April 6–7, Maj. Gen. Henry Halleck amassed three Union armies —the Army of the Tennessee, the Army of the Ohio, and the Army of the Mississippi— for an advance on the vital rail center of Corinth, Mississippi. Made cautious by the staggering losses at Shiloh, Halleck embarked on a tedious campaign of offensive entrenchment, fortifying after each advance. By May 25, 1862, after moving five miles in three weeks, Halleck was in position to lay siege to the town.  Confederate morale was low and Beauregard was outnumbered two to one. The water was bad. Typhoid and dysentery had felled thousands of his men. At a council of war, the Confederate officers concluded that they could not hold the railroad crossover. Sickness had claimed the lives of almost as many men as the Confederacy had lost at Shiloh.
Siege of Corinth