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13th Amendment
This amendment to the constitution banned slavery in the US. The exception to this is as a punishment for a crime. -
14th Amendment
The 14th amendment protected citizens' rights and guaranteed equal protection under the law. It also defines US citizenship. -
15th amendment
The 15th amendment made it illegal to deny the right to vote to anyone based on race, color, or previous enslavement. This was the 3rd and last Reconstruction amendment. -
Plessy V Ferguson
This was a landmark US Supreme Court decision that ruled "separate but equal" segregation laws didn't violate the Constitution.