How did the Zimmerman note lead the United States closer to war?

Answer 1

The Zimmerman Note was a secret diplomatic communication sent by the German Foreign Secretary Arthur Zimmerman to the German Minister in Mexico, Heinrich von Eckardt, on January 16, 1917. The note proposed an alliance between Germany and Mexico in the event of the United States entering World War I. It proposed that if the United States declared war on Germany, Mexico would join the war on the side of Germany and, in return, Germany would support Mexico in regaining territories lost to the United States in the Mexican-American War. The note was intercepted and decoded by British intelligence, and the contents were made public in the United States on March 1, 1917. The publication of the note caused outrage in the United States and was a major factor in the decision to declare war on Germany.