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Answer: The main part of the Battle of Cold Harbor was a frontal assault on Confederate lines that ended in nearly 7,000 Union casualties after less than an hour—by some accounts most were lost in as little as 10 minutes. It was one of the most brutal confrontations of the war.Confederate General Robert E. Lee (1807-70) secured another victory two years later, in June 1864, at the Second Battle of Cold Harbor, one of the most lopsided engagements of the war.

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