Zimmermann

''Imagine if the Zimmermann Telegram had not been intercepted and cracked by Britain in 1917 and Mexico had joined the war against the Entente. The lack of American troops on the Western Front would have very little impact on the course of the war but, what about the Second World War? How would it be affected? This time line also has several other POD's which will be mentioned later.''

Zimmermann Telegram
The Zimmermann Telegram was a 1917 diplomatic proposal from the German Empire to Mexico to make war against the United States. The proposal was accepted by Mexico who later went on to invade the United States after she declared war in the May of 1917.