The Union won and took control of the Mississippi River.
The Union attacked Atlanta GA which is Southern territory. They planned on burning their supplies but it got out of hand and they burnt a lot of the city down. It crippled the south and made them weaker.
The Confederacy surrendered and the Union won the war. The Union was very generous to the Confederacy by letting them keep all horses and firearms. They didn't decide to give them a bad punishment. All slaves and African Americans were freed.