Tyrelll

Hello, I'm currently running "Badlands", Steam version of the game. When I build a camp, I can't send any buyed units to the other teams in order to reinforce them. The menu in the diary is empty (send units), and I just can keep them in my team, if I disband them they disappear. The manual is not clear at all about this. Is it a bug and will it be fixed ? Or there's a special command ?