warrior soldier holding gas mask angle view closeup

team mission unit service exercise operator recon dark pollution guard battle ammunition patrol respirator zone tactic chemical danger fight security special forces sof gas mask training nuclear force defense toxic uniform accessory airsoft apocalypse armed army attack background battlefield biohazard black brown close-up clothing combat commando concept conflict epidemic fashion fighter gear gloves hands hold marine mercenary military object officer olive paratrooper person private protection protective scene soldier style tactical trooper virtual virus war warfare warlike warrior zombie