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Week 9: World War I
Watch the Following Supplemental Videos
- Blockades, U-boats and Sinking of the Lusitania [Enter key starts video]
Learn about the naval warfare between Britain and Germany that led to the sinking of the Lusitania. Created by Sal Khan.
- Zimmermann Telegram [Enter key starts video]
An intercepted telegram between Germany and Mexico led the United States to declare war. Created by Sal Khan.
- United States Enters World War I [Enter key starts video]
Learn about the United States’ reasons for entering World War I. Created by Sal Khan.