Ancestors involved in the American Civil War

Bombardment of Fort Sumter by the batteries of the Confederate states

150 years ago on April 12, 1861 the Confederate States of America fired the opening shots of the American Civil War when they began bombardment of Fort Sumter.

I don't have an exhaustive list of relatives involved in the Civil War, but this is what I have, so far:

On my father's side:
My 3rd Great Grandfather, Wiley D. Brassfield (1827-1902) was in the 8th Regiment Iowa Volunteer Infantry, Company B. His brother Nicholas R. Brassfield (1848-1926) was also in the 8th Regiment Iowa Volunteer Infantry, Company B. A few months ago I posted a bit about what their regiment did while the were in.

On my mother's side:
My 4th Great Grandfather, Benjamin Wise Firman (1800-1862) was in the Wisconsin 16th Infantry, Company H. He died May 5th, 1862 of disease after the Battle of Shiloh.
My 3rd Great Grandfather, Ira Wood (1834-1909) was in the Wisconsin 1st Regiment Cavalry, Company G.

I'm sure there are some more relatives that I haven't found yet, but I'll keep looking.

The above image is courtesy of the Prints and Photographs Division, Library of Congress via Wikimedia Commons.