Compare and contrast American manufacturing in the early 1900s and late 1800s. What had changed? Why?

What pact signed on 1949 reinforce that the united states would not return to an isolationist policy

How did african americans the union during the civil war? a. by serving as representatives in congress b. by enlisting in the military to fight c. by organizing massive slave revolts in the south d. by negotiating for peace with the confederacy

What was the overall impact of eli whitneys introduction of interchangeable parts?