Answer: Atlanta
Near the end of the war, a trio of Union armies, led by Gen. William T. Sherman converged upon Atlanta, where they were met outside the city by a desperate Confederate counterattack that failed.
The Battle of Atlanta was the bloodiest part of Sherman’s March through Georgia, costing the Union 3,700 casualties, while the Confederates lost 5,500 men. Sherman’s forces continued their advance and finally surrounded the city, besieging it for the entire month of August.
Finally, on September 1, Confederate Lt. Gen. John Bell Hood, a veteran of Antietam and Gettysburg who had lost his leg at the Battle of Chickamauga, gave up and abandoned the city, allowing Sherman’s forces to enter.
The capture of Atlanta crippled the Confederate war effort. For Lincoln, who faced a difficult election in 1864 against one of his former generals, George B. McClellan, the victory provided a lift at the polls, helping him win and pursue the war to its conclusion.