Quote Originally Posted by Martok
Depending on the general and/or what kind of vices & virtues he has, you can maybe risk going down to -4 morale. Anything lower than that, however, and your general's probably not worth keeping in the field. Best to either disband his unit or grant him honorable retirement.
-4 is really a lot since that amounts to a four star general with v&v with a -6 malus so that would mean an unhinged loon good runner (IIRC). Could be ok with some high morale units like kinghts but with militia, spearmen, CS and the like the battle could be quite short.

If the battle is sure to be a walk in the park anyway, I would suggest that you are better off using another general with slightly less stars but no bad V&V. Personnaly I am always on the lookout for general with V&V that increase morale. If they are in a half decent units (nothing less than FS, FMA), I use that unit as a general for easy battles such as assaulting small forts, dealing with rebels and the like until he gets to two or three stars and then I add few titles to get him to four or more (could give plus 4 by just adding titles - for instance Duke of Trebizon + Admiral but those are not on endless supply so that better choices can take precedence). Princes who get the "famously brave" V&V a great for this even if they have 0 stars because if they have not received V&V such as strange, pride, secret pride and/or chinless wonder, they will never get those afterwards (even when they have ceased to be princes or royal general). On the other hand, if I do it with a three stars "non-royal" general there is always the risk that your efforts will become pointless. Don't know if it's me talking nonsense but I seem to almost always get secret pride each time that I boost a crusade untits from 3 to 7 after I have taken Constantinople ... ok, makes sense that the guy may become a bit too pleased with himself but ....