The 34th Ohio Volunteer Infantry Regiment (or 34th OVI) was an infantry regiment that served in the Union Army during the American Civil War. It primarily served in the Eastern Theater in what is now West Virginia and in Virginia's Shenandoah Valley region. They are well known for wearing early in the war an americanized zouave uniform which consisted of: A dark blue jacket with red trimming, a pair of sky blue baggy trousers with two stripes of red tape going down vertically, a pair of tan gaiters, and a red Ottoman styled fez with a blue tassel. They are known as Piatt's Zouaves