The 72nd Pennsylvania Infantry (originally raised as the 3rd California) was a volunteer infantry regiment which served in the Union Army during the American Civil War. It was part of the famous Philadelphia Brigade. They wore a very Americanized zouave uniform, consisting of a zouave jacket trimmed with red without a tombeux on the jacket, sky-blue trousers with a red stripe down the leg, a sky-blue zouave vest trimmed in red, white gaiters, and a dark blue kepi. The jacket was decorated with 16 ball brass buttons down the front of the jacket, which were not part of the original French Zouave uniform.