Lanefan
Victoria Rules
Agreed, though I'd go with guidelines rather than hard rules.I'm all in favor of there being some form of guidelines for morale failure for monsters and npcs.
I like to think of the monsters I use as being alive and having feelings as well as the intelligence to know when things are getting out of hand. I have no problem with them running away or surrendering.
Having rules designed for the game means I don't have to use old rules or invent my own.
Maybe have 6 or 8 levels of morale - fanatic, stout, steady, average, shaky, cowardly, terrified (I'll leave it to others to come up with better terms) - described briefly in the DMG along with what they might represent in game terms*; then put a line in each monster write-up something like: Morale: steady in lair, average elsewhere; except fanatic when in sight of commander.
* - this shouldn't take more than half a page, total.
Lan-"easy enough to houserule in any case, regardless of edition"-efan