yes, they even had all black batallions when black people got enrolled. there was a great movie about it, a white captain of an all black batallion

Yes. Although they werent accepted. They were still useful. It seems they used them as unhired soldiers. I am not sure if they were paid, but I highly doubt it. There was still segregation and seperation, they were closely watched, and not trusted. I think some were granted their freedom after, but nothing changed, they were still frowned upon.

Yes, there was even a few movies about them. I think one was called Buffalo Soldiers with Danny Glover.

Absolutely. The knowledge that there were black battalions and black soldiers fighting against the Confederacy was very powerful for still enslaved blacks. The South's economy completely destabilized as more and more slaves revolted.

There were a few "all black" regiments (though always with white officers) in the Union Army during the Civil War. Initially, they were paid something like half the rate of the normal wage for Union Soldiers, but the first black regiment basically spit the insult back at them, and refused to take any pay, officers included. I don't know when or if the Army changed the policy. Watch "GLORY" - great movie! - for a good and reasonably historic look at the way things were. That regiment's attack on Fort Sulivan is historic - a huge defeat tactically: the regiment was almost annihilated - but a victory strategically and symbolically, especially for blacks. After that regiment so distinguished itself, the Union formed several more all black regiments (still with white officers only), and they were among the most highly decorated units in the war. Disgracefully, though, after the Civil War, blacks soldiers and sailors were relegated to the ranks of menials and non-combatants (cooks, stewards, supply truck drivers, manual laborers for the Army Corps of Engineers, etc.) up through WWII. In WWII, in fact, it was commonly believed that blacks - "being 30,000 years behind whites in evolution, and basically just simple-minded savages" - would panic and rout under artillery fire. If you can talk to any white American educated before WWII, you'll find that most have a hard time comprehending that blacks have been some of the best of America's frontline combat troops for the last 50 years, and together with the Scotch-Irish (the rednecks) form the backbone of the Marine Corps.