No, 180,000 black soldiers does not equal 6 million slaves. They didn't "hoof it up to the northern armies". Many thousands left the plantations to Union occupied areas of the South. ALL could have left the plantations by 1863, because there was no number of whites to stop them, but the majority (millions) stayed at home.
"That’s why they were not going to let the “Black Republicans” change that"
Is that the reason they seceded Kevin, to destroy slavery? Because if you look at the plan of secession and results it brought about the secession leaders (who ever they were) perfectly accomplished the complete emancipation and end to slavery in just under two years.