Matthew C. Perry was the Commodore of the U.S. Navy who compelled the opening of Japan to world trade in 1854, by forcing on the Japanese shogunate the treaty of Kanagawa. Because of his threats and show of force, Japan was pressured to allow trade with the United States through the establishment of a treaty called the Convention of Kanagawa.
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A. too many people in texas
True, if the telegraph had existed before the war would have had a different outcome
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It allowed each state to create its own laws about slavery.
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D: It had temporarily relieved sectional tensions