Why did the united states not complaining about the construction of the berlin wall in 1961

What do historians call the political,social,or cultural circumstances surrounding an event?

What bodies of water provided the eastern border of the zhou dynasty? ?

How is blue ridge different from the other mountain regions in georgia? check all that apply. it has higher elevations. it has a warmer climate. it includes national forest land. it includes brasstown bald. it has fewer visitors and tourists