During the American Civil War, Ohio contributed many officers, politicians, and troops to the Union war effort; as well as a small number for the Confederacy.
Union
The following is a partial list of generals or rear admirals either born in Ohio or living in Ohio when they joined the Union Army or Union Navy (or in a few cases, men who were buried in Ohio following the war, although they did not directly serve in Ohio units). There also were 134 men given the brevet rank of brigadier general, and occasionally brevet major general, a few of whom are also included in this listing.
