[Non-Sequitur]

He is well aware that black Confederates fought integrated in the ranks of the volunteer state regiments.

Not legally, and mostly in the minds of the southron supporters. Of all the southern blacks associated with the confederate army I doubt that more than a fraction of one percent served in combat roles.

[smug]

Not legally,

The legal restriction was at the national level. Davis had no control over who enlisted at the state and local level. Remember "state rights".