Photo G3035: Pressure type trigger devise (arrow) wired to a U.S. 81 mm mortar round in the roadway between B Company Outpost-1 and 2 in the 720th MP Battalion, 89th MP Group, 18th MP Brigade Tactical Area of Responsibility, Bien Hoa Provence in Vietnam, sometime during November-December 1968. Courtesy of 1LT Edward R. Mendez, B Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, Long Binh Post, Vietnam 1968-1969.