In this episode of "Crash Course U.S. History" titled "America in World War I," John Green delves into the multifaceted impact of World War I on the United States. The video explores America's brief military involvement and its profound domestic implications, highlighting key events like the Lusitania sinking and the Zimmerman Telegram. It discusses President Wilson's Fourteen Points and America's economic contributions to the war effort. Green examines the resultant socio-political changes, including the Espionage and Sedition Acts, and the subsequent repression of civil liberties. The episode also touches on cultural shifts, the rise of propaganda, and the eventual pivot to isolationism. Key educational themes include U.S. foreign policy, constitutional rights, and the socio-economic aftermath of the war. Part of the "Crash Course U.S. History" series.