Answer:
In 476 C.E. Was the fall of Roman Empire
Andrew jackson enacted an indian removal act (the trail of tears)
Option A: The U.S. was concerned that trade between Europe and Latin America would decrease.
The difference is that the older union tend to pursue practical things such as fair wages, number of holidays, and working hours.
The newer union on the other hand, tend to focus on something that related to social justice, such as fair treatment between each races, same opportunity to rise the ladder, etc.
At the beginning America was too weak to fight so it would affect us back then because we were not prepared