The Zimmerman Note
The Zimmerman note is a note Germany sent to Mexico but the U.S intercepted the letter. The United States realized that Germany was trying to keep them out of the war by having Mexico side with them and go to war with the United States. Germany was bribing Mexico to go to war with the United States by telling Mexico that they would get their land back from the United States.
The Lusitania
The Lusitania was a ship Lusitania