Answer:
Depends which era you are talking about.
Step-by-step explanation:
Mid 1700's:
- U.S. gains independence fights over it then goes into a state of isolationism
1800's is the whole era of expansion and civil war Europe nothing major happens
In World War I USA is still in isolation while Europe is having a World War
Then the USA sent troops and supplies then was a great depression then another World War II and now just conflict everyday