...Laid down FIRE and added a few during set up with my Br. Generals.
This is a big mistake tactically. Don't do it. You need these Generals to provide re-rolls for adverse rolls when their division is advancing.
The only time you should use this ability is when a division has halted its advance and not used the General's re-roll ability and you get an Open Fire event. That re-roll ability is too valuable to be used for anything else. Only if the division has halted, should you use the general's ability to enhance fire on Union positions.
Edited for clarity.