Description: Motor patrol boats with Lewis guns as 'anti-aircraft' weapons speed down river; men with stretcher run to aid of wounded man, who is conveyed to first aid station and placed in an ambulance. A medical officer, masked and gowned, stands beside "Operation Tent". Arabs on horseback, armed with swords and guns ride across desert. A motorcycle battalion (on Western Front) drive along road and over rough terrain. Some are camouflaged under Coastal defence system; consists of barbed wire entanglements, trench and look out post, men are alerted, a large gun is fired seawards from beneath a Shelter.