What did the Zimmerman propose if the united States went to war with Germany during World War 1?

The Zimmermann Telegram, sent by German Foreign Minister Arthur Zimmermann in January 1917, proposed a military alliance between Germany and Mexico in the event that the United States entered World War I against Germany. In exchange for Mexico's support, Germany promised to help Mexico regain territories lost to the U.S., specifically Texas, New Mexico, and Arizona. The interception and publication of this telegram by British intelligence inflamed American public sentiment against Germany and contributed to the U.S. decision to enter the war.