The answer is the Zimmerman telegram and Germanys Aggressive actions
Explanation:
The Zimmerman telegram what a telegram from Germany to Mexico asking them to attack the United States to keep them out of the war in Europe.
Germanys aggressive actions included the sinking of the British Passenger ship the Lusitania. 1,197 people died and 128 of them were Americans. These were the two reasons the U.S joined WW1
