Photo G2415: Members of the 188th MP Company, 504th MP Battalion, DaNang, Vietnam, test firing their weapons, in preparation for the coming "Hour-of-Darkness" perimeter watch duty in the spring-summer of 1971. If you can identify any of these MP's use this Email Link. Courtesy of SP/4 Ron Luchka, 188th MP Company, 504th MP Battalion, 16th MP Group, 18th MP Brigade, Vietnam, November 1970 to July 1971.