July 1st - 3rd 1863, in Gettysburg Pennsylvania. Robert E Lee, and Lt. James Longstreet were the South's leaders. George G Meade and John F Reynolds were the North's leaders. The battle lasted 3 days and killed about 50,000 people in a North victory.
The leader supported the North and free side, and did many things including fighting in the war and was the 16th president of the United States of America. He died after being assassinated in a theater later in life. He was a tremendous leader who fought for what he had and backed down for nothing.