Flag Ambulance Flag The 1st Division of the 2nd Army Corps flew this flag on an ambulance. Each corps in the Union Army was assigned a distinctive badge. Usually composed of 3 divisions, the 1st division was assigned a red badge, the 2nd division white, and the 3rd division was assigned blue badges. Wool bunting with cotton 13 17/8 inches x 28 3/8 inches Gettysburg National Military Park GETT 31123