A new mechanism, the tank, ended the stalemate. An old mechanism, the blockade, choked off the German supply of food and matériel. The increasing rebelliousness of the foot soldiers threatened the security of the bureaucrats. Or the death machine worked too well, as against France, and began to run out of raw material. The Yanks came over with their sleeves rolled up, an untrenched continent behind them where the trees were not hung with entrails. The war putrified to a close.
