The strategy used was establishing the United Nations
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Before Gettysburg, most major Civil War battles in the East
were won by the Union military.involved General Robert E. Lee.were fought on Confederate soil.<span>involved General Ulysses S. Grant.</span>
In 1854, the Missouri Compromise was repealed by the Kansas-Nebraska Act. Three years later the Missouri Compromise was declared unconstitutional by the Supreme Court in the Dred Scott decision, which ruled that Congress did not have the authority to prohibit slavery in the territories.
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