mac_truck, you are wrong. There were free black Confederate soldiers. There were not a lot, they were constrained, and many were disbanded as the war progressed. But there were some.
Check out the description of the 1st Louisiana Native Guard (CSA).
Your own posts notes that the unit was never accepted for duty with the Confederate military or the Louisiana militia, wasn't supported in any way with arms or equipment, and was generally ignored. That's hardly a ringing endorsement of black service in the Confederacy.
I'm glad you brought up the so-called Louisiana Native Guard because their story is one that gets the most spin from the confederate revisionists. Their websites are chock full of an 'authentic' photograph of black confederate soldiers in uniform holding weapons with an inscription "First Lousiana Native Guard 1861".
Well the famous Louisana Native Guard photograph turned out to be an elaborate hoax as researchers from the Univeristy of Virginia demonstrated HERE . Yet the perveyors of Dixie revisonism persist and the doctored photo enjoys a wide circulation revisionist websites to this day. You can even buy a t-shirt with the photograph and the ironic title "Legends of the Confederacy" on it (lol).
Yes there was a short-lived militia of free mixed race soldiers in New Orleans. They were issued no weapons, they fought no engagements, they surrendered at the first opportunity, joined the Union and spent the rest of the war fighting against the Confederacy. That's the unspun story.
Yeah, and the native guard were so reviled and rejected by their “countrymen” that they jumped at the chance to join the USA forces after the Union occupation of New Orleans.