 What effect do the bombs have on the war?
Three days later they had landed in Spain, merged with another division, then crossed the Pyrenees into France, and finally to Paris where the fighting had begun. The Russians had not yet used the H-bomb; the threat of annihilation by the retaliation forces had been too great. In cities, great and small, the air raid sirens sounded, high screaming noises which had jarred the people from sleep in time to die. Many bombers fell, victims of fanatical suicide planes, or of missiles that streaked across the sky which none could escape. The retaliatory forces had roared away to bomb the Russian cities. Most of the cities and the majority of the population of both countries had been destroyed.
 They end the war, but turn it into a semi-apocalyptic landscape.
 They end the war but turn the world into a zombie landscape.  They end he war and restore peace and harmony, even though there are still some stragglers wandering home from the war.  They end the war, but turn it into a semi-apocalyptic landscape.  They end the war, but turn the world into tribal groups with strict borders.