They were having conflicts that they couldn't solve and it eventually lead to the Civil War. Hope this helps
Roosevelt had many achievements during his tenure as president from 1901 to 1909. In 1905, he negotiated a peace treaty between Russia and Japan known as the Portsmouth treaty.
The answer is D. Contrasts with the Soviet Union developed and in 1959 they moved toward becoming rivals in the global framework offering two unique models of socialism. China was seen by progressive US presidents from Dwight Eisenhower to Lyndon Johnson as a feature of the more extensive 'communist threat'; a view fortified by China's procurement of atomic weapons in 1964. China's contribution in the Korean War (1950– 1953) set Chinese troops specifically against US powers and their partners, bringing about a stalemate that kept on isolating North and South Korea well into the twenty-first century.
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The reservation system was created to stay Native Americans off of lands that European Americans wished to settle. The reservation system allowed Indian tribes to manipulate themselves and to take care of a number of their cultural and social traditions.
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