What did bartolomeu dias and vasco da gama contribute to portuguese control of the spice trade and the gold trade?

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

How have a past president and our current president abused the powers granted to the president of the united states by the constitution and the people ?

Which of the following was a typical tactic of nativists in the late 1900?