What happened to African-Americans after the reconstruction?

They didn't lose any rights as a mater of fact they gained many rights that were not recognised before the civil war. The big problem in their case was that they were not in a position to fight for them. They were lynched left right and centre and even during the war they were treated as second class citizens. People may sing the anthem with a hand over the heart but it is taking a long time for them to realise what they are singing for.