Canadian airmen train as commandoes: airmen marching to training ground on base. Sequence on them receiving instruction on bayonet fighting, racing across barbed wire entanglements, through explosion blasts, over various obstacles, bayoneting dummies, crawling through conduits, climbing boarding nets, swinging from ropes, scaling cliffs, crawling under live machine gun fire. Shot of group of officers watching. Sequence on men bare to waist doing physical training, boxing, wrestling.