 During the Vietnam War the Diamond as well as the Spade, Heart and Club were used on the helmet by units of the 101st Airborne Division but instead of white it was black and most of the time a black permanent marker was the only thing needed to apply it.Post Vietnam the tradition carried on through the late 1970s.The modern day members of the 501st resurrected the tradition in 2003 prior to deployment to Afghanistan with two black cloth patches sewn to each side of their helmet covers.