9 World War I
Primary Source Hollywood Movie: The Big Parade, classic 1925 silent movie. You could start at 1:30 and assign the last hour of the film: https://commons.wikimedia.org/wiki/File:The_Big_Parade.webm
Primary Source Images: Smithsonian collection of 12 U.S. propaganda posters for WWI: https://www.smithsonianmag.com/history/posters-sold-world-war-i-american-public-180952179/
Primary Source Text: Wilson’s Fourteen Points: https://www.theworldwar.org/learn/peace/fourteen-points
Secondary Source Text: Smithsonian magazine article on U.S. invasion of Russia in 1919, beginning of first Cold War: https://www.smithsonianmag.com/history/forgotten-doughboys-who-died-fighting-russian-civil-war-180971470/
Hollywood Movie: The Killing Floor: excellent 1984 movie about the Great Migration to Chicago and union organizing in the stockyards, culminating in 1919 race riot, freely available on Kanopy: https://www.kanopy.com/en/product/11109900?vp=cod