In Plessy v. Ferguson, the United States Supreme Court ruled that the doctrine of "separate but equal" was permissible under the US Constitution.
This was later overruled in Brown v. Board of Education.
It was the battle of Gettysburg that was the most famous battle of the war and the battle after which the South started to decline. It caused the largest number of casualties of the entire war.
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Can you please ask this question in English. So that I could help you
