Khan Academy Static

Naval blockades in World War I to starve enemy nation of trade. Contrary to what many think, American entry into WWI was not due purely to the sinking of the Lusitania. Learn more about what caused the United States to play its first major direct role in a European conflict.

13238_United_States_enters_World_War_I.html

13236_Blockades_u_boats_and_sinking_of_the_Lusitania.html

13237_Zimmermann_Telegram.html