Millions and millions of Americans waited for Zimmermann to give his speech on the Zimmermann Telegram.
"What you have heard about the Zimmermann Telegram is, in fact, true."
Hearing this news enraged many Americans and they became very angry with Arthur Zimmermann. The telegram had meant that their was an automatically formed alliance between Germany and Mexico and Mexico would reclaim possession of Texas, Arizona and New Mexico in the event that the U.S. entered the war.
Admitting the truth about the Telegram led to helping the United States declare war on Germany.
"We intend to begin on the first of February unrestricted submarine warfare. We shall endeavor in spite to this to keep the United States of America neutral. In the event to this not succeeding, we make Mexico a proposal of alliance of the following basis.."
The Zimmermann Telegram led to the United States joining the war in 1917.