They didn't give their lives for that purpose. They gave their lives to make certain that the corrupt boot of the Washington DC "establishment" could remain firmly on the neck of the states producing money from trade with Europe.
They didn't make the war about slavery until nearly two years after it had started, and even then, they did not eradicate slavery in areas under Union control.
We've all been fed a lie that the war was about slavery. No, the war was about the Economic power of the Washington DC/ New York elite. Same people we are fighting today.
You know that and I know that, but...