Any blacks "fighting" for the Slavers were a tiny number although there were plenty of valets for the aristocracy, ditchdiggers, cooks, teamsters etc. When United States armies appeared ANYWHERE in the South they were inudated by slaves trying to escape the Tyranny of the Whip and the Lash.
Of course, the Slavers provoked the RAT Rebellion over slavery that was what they said themselves not just me. NONE of the other concerns would have provoked a decade long conspiracy to secede. There was no "tyranny" and the Slavers did not even wait until Lincoln took office before attacking the US.
There was NO "almost didn't stay part of the Union after its founding" except in your mind. And the South controlled the federal government for almost the entire period prior to the RAT Rebellion.
But these threadbare falsehoods are all the DS's have to try and defend the indefensible.
I didn't claim they fought in large numbers. I also didn't claim that slaves fought either.
I said blacks, and I meant blacks, and free blacks did fight as combat soldiers for the Confederacy. And while most were support personnel, there were still volunteers among the blacks to fill those roles, and to fill combat roles.
Denying it is not going to change the fact that there were some. Yes, more fought against the South than for. Yes, many slaves fled the South the first chance they got. But, that doesn't change history - and your insistence does not rewrite history.
The South had greater, long standing grievances with the North, over tariffs, taxes, trade, and divisive social differences than the North's threat of emancipation. Emancipation was a symbol for both the North and South, and became most relevant AFTER the war had started. But it was not the single, sole issue around which the question of secession revolved.