The reason why the United States entered World War I was because Germany tried to ally with Mexico to invade the United States.
<h3>Why did the United States fight in World War I?</h3>
There were several supporting factors for the interventionists that wanted the United States to get involved in the war such as unrestricted submarine warfare by the Germans which threatened American lives and shipping.
There was also the Zimmermann Telegram which showed that Germany wanted to lure Mexico into fighting the United States.
Some Americans however wanted the U.S. to avoid the war because they argued that Europe should take care of its own problems without wasting American lives.
It was Peter the Great who was fascinated by Enlightenment thinkers and corresponded with Voltaire and Diderot, which was a major break from the age-old Russian orthodoxy that had dominated the country for so long.
