The western allies lost the cezchoslovakia from witch the Greman armies couldn't be out flanked
It greatly changed the view of the Vietnam War back in America. People already didn't want U.S boots down on Vietnam, but the My Lai massacre made the U.S People really change views and turn on the war. This also affected the government, which then affected how the U.S commanders dictated the war.
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Because there was a debate about whether or not slavery should be legal
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