Final answer:
The sinking of the Lusitania, the Zimmerman Telegram, and unrestricted submarine warfare drew America into WWI.
Step-by-step explanation:
At the beginning of World War I, the United States practiced isolationism and did not initially get involved in the conflict. However, several events played significant roles in drawing America into the war:
- The sinking of the British ocean liner, the Lusitania, by a German submarine in 1915. This event resulted in the death of 128 Americans and raised public outrage against Germany.
- The revelation of the Zimmerman Telegram in 1917, which was a German proposal to Mexico for a military alliance against the United States. This further fueled American anger towards Germany.
- The resumption of unrestricted German submarine warfare in 1917, which led to the sinking of American merchant and passenger ships. This ultimately pushed the United States to declare war on Germany in April 1917.