What did the u. s do as a nation when world war 1 broke out?

We adopted isolationism during the most part of the war but germans sub kept attacking neutral ships and then the german sent the zimmerman telegram, which was a coded message sent from germany to mexico asking if they would attack the United States.

Explanation:

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.