I was recently given this advice ( thank you 3Jane) because I had the same problem as you. I did not try it as I needed to re-install anyway, but I am sure it will fix your problem!
Go into My Documents/SH3/data/cfg/Careers/*your kaleun's name* and open both the Careers and Career_0 files with notepad, find the line WarOver= and make sure it says false.