Answer;
The fort was located on top of a hill and surrounded by swamps
Step-by-step explanation;
-The Battle of Vicksburg, Mississippi, also called the Siege of Vicksburg, was the culmination of a long land and naval campaign by Union forces to capture a key strategic position during the American Civil War.
-President Abraham Lincoln recognized the significance of the town situated on a 200-foot bluff above the Mississippi River.