Preserve it's small armies while doing enough damage to erode the Union's will to fight
Yes, there were five states that joined the Union in war, but I do not think they were ten years apart.
Answer: The Battle of Iwo Jima was fought between the Japanese army and the United States Marine Corps (USMC). The battle, known to the USMC as "Operation Detachment", started on February 19, 1945 and lasted until March 26, 1945 when the last Japanese soldiers were captured or killed.