<span>William Butler Yeats thought that the postwar era was very similar to the apocalypse. This is because both are nightmarish and pitiless. William Butler Yeats' poetry was often politically and religiously motivated so it makes sense that he would compare the post war world (political) to the apocalypse (religious).</span>
The US enhanced their army draft, The USFA(United States Food Administration) became the biggest supplier of food
Long distance travel and military. I'm not fully sure though.