Why were the nomads constantly moving from place to place thousands of years ago?

What type of speech was president reagan giving at brandenburg gate in west berlin

Complete this history worksheet . answer as many questions as you can.

What did president roosevelt do to aid panama in becoming an independent country? a. he negotiated a peace treaty with nicaragua to purchase the land. b. he invaded colombia to establish a us base for defense. c. he placed warships around panama to block sea lanes. d. he used dollar diplomacy to block imports to nicaragua.