The last question; did Southern officers have command over Northern units? Or were Southern Loyalists put into their own units? Best regards!
Sir, Maybe you have heard of George H. "Pap" Thomas. He commanded the "Army of the Cumberland" for the Union. His family had been in Virgina for ages. He destroyed the Army of Tennessee under General Hood at Nashville. The only Army destroyed during the Civil War. That is why he's called the Rock of Chickamagua and the Hammer of Nashville. Or perhaps you have heard of David Glasgow Farragut and his famous battle on the Mississippi, in which he told his sailors "Damn the topedos ..Full speed ahead. He was from Knoxville Tennessee. Did Southern officers command over Northern units? They not only commanded over Northern units, but they commanded Northern Armies and Northern Navies. Many Southern Unionst like those at Fort Pillow, would pay the ultimate price for their loyalty to the old flag.