I've added two particularly striking covers of Hitler Youth training material. One is from, I think, 1934, and has a quotation from E. M. Arndt: "To be a people is the religion of our age." The other is from 1939, after the annexation of Austria. The title is: "80 million Germans live on 580,000 square kilometers." The point is that Germany is overcrowded, and needs more territory.