Via Animation Archive:
"By the end of the First World War, the techniques of waging war in the hearts and minds of the public had entered the modern era. Propaganda had become much more sophisticated and powerful. By WWII, leaders realized that battles could be fought and won on the homefront. Propaganda became an important part of motivating the population to work together toward the common goal of defeating the axis powers. Compare the WWI posters in this and the previous post to the examples from WWII presented here. Notice how the design and layout enhance the emotional impact of the concepts. Many of these posters still pack a wallop."