MacArthur was insubordinate with President Harry S Truman, who as president is commander in chief of all the armed forces. MacArthur wanted to expand the war in Korea after the Chinese entered the war, and he made comments to this effect after he had been told not to.
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Homophobia slowed the government response to AIDS because at the time it was thought that AIDS could only be contracted from relationships.
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They helped to transport raw materials and/or goods so they could be sold in markets.
Douglas applied popular sovereignty to Kansas in the Kansas-Nebraska Act, which passed Congress in 1854. The Act had two unexpected results. By dropping the Missouri Compromise of 1820 (which said slavery would never be allowed in Kansas), it was a major boost for the expansion of slavery.