TM 10-8415-209-10 TM 8415-10/2 b. Chemical   Protective   Overgarment.        Chemical    Protective    Overgarment,    also    called    Battle    Dress Overgarment (BDO)(OG 84) is a woodland or desert camouflage two piece suit, and a replacement for the olive drab (OD) green CPOG, still in supply system. 1-5