Answer:
Charles Wilkes commanded the South Sea Exploring Expedition from 1838 to 1842. This six-vessel expedition surveyed South Pacific islands, charted continental coastlines, proved Antarctica is a continent, and collected natural history and ethnological specimens that formed the basis of the Smithsonian Institution's collections.
Explanation:
Charles Wilkes (1798-1877) was a naval officer from New York, widely commemorated for exploring the Antarctic and being a crucial element of the "Trent" affair in the time of the Civil War. Beginning his naval career when he was only 17 years old, he became part of the British navy in 1818, navigated in the Mediterranean for 3 years and later sailed to the Pacific.
1. national debt
2. spread of communism
3. President's political opposition
4. arms race
2. spread of communism
Explanation: The Truman Doctrine was request to the US Congress for assistance for Greece and Turkey (weapons, food, aid) in their on-going struggle against Communism within their nations. The Marshall plan was billions of dollars in US aid for the war revenged nations of Europe, following the Second World War. The intention of the Marshall plan was to provide an incentive for the nations of Europe to reject a move to communism and allow a stable transition to democratic governments
<span>Loyalty to old immigrants and discrimination against new immigrants.</span>