Except for Ft. Henry, Donelson, Shiloh, Corinth, Memphis, Island Number 10, Columbus Ky, Pea Ridge, Nashville, Iuka, and even New Orleans .... and elsewhere, I am sure I am missing some. Even with a Union loss at Perryville, the CSA had to retreat, and 1862 left the Union in pretty firm control of Kentucky, Missouri, Arkansas, and everywhere on the Mississippi except Vickburg.
Henry, Donelson, Columbus and New Orleans, Memphis should not have been give-a-ways. I think they should have been contested more, due to the importance of the river, but that is just my opinion. This much I do know some Mississippi were mustered in and trained for the defense of the Gulf coast. The gulf coast lead to the opening of New Orleans. They were not used to protect passage to New Orleans which allowed flanking of Confederate forces
I am not aware of a 1862 battle of Nashville.
Iuka I am not sure that battle didn't end up a standoff of sorts. Price was mooing anyway and Rosecrans just delayed this move.
I think in Virginia lee was holding his own and the AOT was still a force to be reckoned with.
I am no army expert nor do I claim to be an expert on battles. If it is your desire to discuss battles I would suggest someone other than me.