90th Pennsylvania Infantry Regiment

90th Regiment Pennsylvania Volunteer Infantry
90th Regiment Pennsylvania Volunteer Infantry
	State Flag of Pennsylvania, circa 1863
Active	September 1861 to November 26, 1864
Country	United States
Allegiance	Union
Branch	Infantry
Equipment	Altered smooth-bore muskets (until 1864)
Engagements	American Civil War: Northern Virginia Campaign; Battle of Cedar Mountain; First Battle of Rappahannock Station; Battle of Thoroughfare Gap; Second Battle of Bull Run; Battle of Chantilly; Maryland Campaign; Battle of South Mountain; Battle of Antietam; Battle of Fredericksburg; Burnside’s Mud March; Chancellorsville Campaign/Battle of Chancellorsville; Gettysburg Campaign/Battle of Gettysburg; Mine Run Campaign; Battle of the Wilderness; Battle of Globe Tavern;

The 90th Regiment, Pennsylvania Volunteer Infantry was a volunteer infantry regiment which served in the Union Army during the American Civil War. They wore chasseur-style uniforms, which each consisted of a dark blue habit veste with white trim, baggy sky-blue trousers and a dark blue kepi. The buttons on the habit veste were unique to the 90th Pennsylvania. They were the only Union regiment in the entire war to have a specific button design.