Zimmermann Telegram (jan 1, 1917 – jan 1, 1918)

Description:

Cause:

1. anticipation of resumption of unrestricted submarine warfare
2. tensions with Mexico would slow shipments of supplies, munitions, and troops to the Allies

Effect:

1. intercepted by British and passed on to the U.S.
2. publication cause outrage
3. contributed to U.S. entry into WW1

Added to timeline:

Date: