Manipulation through warfare is essential to ensure classism and power in a totalitarian state. In 1984 by George Orwell the government uses warfare to keep the citizens loyalty for the party.
"Suddenly the whole street was in commotion. There were yells of warning from all sides. People were shooting into the doorways like rabbits. A young woman leapt out of a a little ahead of Winston, grabbed up a tiny child playing in a puddle, whipped her apron around it, and leapt back again, all in one movement. At the same instant a man with a concertina-like black suit, who had emerged from a side alley, ran towards Winston pointing excitedly to the sky. ¨Steamer!¨ he yelled. ¨Look out, guv´nor! Bang over´head! Lay down quick!¨ ¨Steamer" was a nickname which, for some reason, the proles applied to rocket bombs.¨ (1.8.7-9)
The government uses warfare to keep the proles under control.
¨The primary aim of modern warfare (in accordance with the principles of double think, this aim is simultaneously recognized and not recognized by the direct brains of the Inner Party) is to use up all the products of the machine without raising the general standard of living.¨ (2.9.25, Goldstien´s Manifesto)
Keeping the standard of living low makes what the government provides to the people look better than it actually is making the citizens loyal to the Party.