Question

What were the causes, course and consequences of the united states involvement in ww1

Answer 1

German submarines were attacking ships that carried American passengers.

 

Answer 2

The united states entered the war because Germany was using submarines to sink our trading ships, they also sunk a passenger ship called the Lustitania, which killed many civilians. Another reason they entered war was because Germany sent  the Zimmerman telegram that they sent to Mexico to try to have them enter the war against us. The telegram said that if they helped Germany, Germany would help them get land back that they lost during the Mexican–American War.