Arkansas was a deep South slave state, however did not join the Confederacy until May 9, 1861. When President Lincoln called for 75,000 volunteers to end the Southern rebellion, Arkansas saw a threat in Washington DC and joined the Confederate States of America.
Pennsylvania fought on the side of the North during the "War for Southern Independence" 1861-1865/
NO. He was President of the US during this war, but did not fight in it. (He did fight in the Civil War. )
The US fought on the side of the Allies. The other side was called the Axis.
Washington was at war with Hanoi.
The War was between Spain and the US.
The British
The US fought for the South against the Northern Communists.
The Korean War.
Mostly in the southern states during the Civil War.
During the US Civil War Thomas J. Jackson fought on the southern, Confederate side. During the War of 1812 Andrew Jackson fought for the United States, and in the American Revolution he fought for the Continental (US) side.
Great Britain
Germany