The importance and authenticity of the Zimmerman Telegram

Before the Zimmerman's telegram was exposed, the United States had tried to remain neutral in World War I.

However, the text that "if the United States entered the war, Germany would then help Mexico regain-lost territory in New Mexico, Texas, and Arizona" had estbalished in the U.S.

The telegram acted as a catalyst and that made people feel Anti-German.

The other side, the United States inside, some aruged that the U.S is going to war for economic reasons and purpose of getting into history of Europe(choosing friends).

This could be inauthenticity of the Zimmerman Telegram. That means they might used the Zimmerman Telegram just as a private justification to go to war for their benefits.