RAF regiment manoeuvres at Catterick, Yorkshire.
Various shots soldiers running towards camera, they throw themselves on ground and start to set up mortar. The soldiers are doing National Service, they are on an exercise to protect the RAF air base. C/U loading and firing mortar. L/S troops rushing across field. L/S troops running towards trees and crouching behind them. C/U officer looking through binoculars.
C/U mortar firing. C/U soldier crouching behind tree with walkie-talkie set. C/U RAF plane flying overhead. M/S aircraft. M/S troops coming out of trees, past camera. M/S troops approaching river and jumping in. M/S troops jumping in and wading across river. L/S troops wading, explosions in background. M/S, tree in foreground, troops crossing river. L/S troops wading.
M/S car driving through woods. L/S troops rushing to man antiaircraft gun, tent in foreground. M/S aircraft. M/S antiaircraft gun firing. M/S aircraft flying overhead, explosions as fake bombs burst on ground. L/S troops approaching and lying in ridge of ground. C/U officer with revolver.
M/S smokescreen rocket firing, camera pans with it as it explodes on ground. M/S troops come over ridge and charge forward. Various shots troops advancing through smoke screen towards camera. Opposing team of soldiers in foxhole open fire, fight ensues and troops in foxhole are "killed". C/U soldiers pretending to be dead, he suddenly jumps to life, picks up helmet and rifle and runs out of picture. M/S he joins ranks at end of exercise.