What was the intercepted german message that in large measure brought the u.s. closer to war called?

The most notable "intercepted German message" that brought the U.S. into a war is during World War I, in which German Foreign Minister Arthur Zimmermann sent to Mexico to rally support from the Mexican population in favor of Germany to help them fight in World War I as part of the Central Powers in hopes of turning the tide of war. In return, as stated in the Zimmermann Telegram, Germany would in turn help Mexico reclaim lost lands from Texas Independence & Mexican-American wars. This message, coupled with the sinking of Lusitania, led the US public to support the Allies and join the Great War on April 6, 1917.

Learn more about World War I and Zimmermann Telegram, here:

https://brainly.com/question/19624378 - Objective of Zimmermann Telegram.