It seems to me as the union against the AI that it takes a lon time and even requires the occupying side to keep units in most regions to convert control to there side. As a result of this I had a large number of units just sitting in regions to try and keep them under control of the union side.
I have never really understood how the control vs. ownership works. I also found that I had to tie up large numbers of units to try and keep thoses pesky raids down to a small number. Along the border it looked a bit like WW 1 trench warfare with the long line of units and even then the raids would go on and did not seem to me to even be close to what really happened....I mean Reb cav. on the great lakes or in northern Iowa.....is that not stretching it a bit?
Has the "latest patch changed any of this?