Answer
They great general Grant and his men put the city of Vicksburg under siege and along with some very good battle strategies were able to defeat the confederacy.
Step-by-step explanation:
The Siege of Vicksburg was a great victory for the Union. It gave control of the Mississippi River to the Union. Around the same time, the Confederate army under General Robert E. Lee was defeated at the Battle of Gettysburg. These two victories marked the major turning point of the Civil War in favor of the Union.