What war did the Zimmerman Telegram start?

Answer 1

The British intercepted a telegram sent from Germany to Mexico asking the Mexicans to attack the U.S. if the U.S. got involved in WWI. They promised the Mexicans money and a return of AZ, CA, NM territory lost by the Mexicans to the U.S. in the Mexican American War of 1846-8. Mexico considered it, after all, they did not like the U.S. or Wilson, but were more afraid of the U.S. than Germany. Plus, Germany is 1000s of miles away... it was one of the factors that helped bring us into the war.

Answer 2

The Zimmerman Telegram started World War 1. The telegram was sent by Germany to Mexico trying to get them to join in an alliance.