What and when was the Progressive era?

What problems could arise if the united states initiated the marshall plan in european countries without said countries’ cooperation

Choosing to engage in military action to assist another country is an example of sanctions. internationalism. o isolationism. o diplomacy.

Which landmark supreme court case ruled that segregation by race in public education was unconstitutional? a.miranda v. arizona b.plessy v. ferguson c.brown v. board of education of topeka d.alexander v. holmes county board of education