[Graeme Dice]

Originally posted by Merry Jolkar:
If I have him retreat after he's fired of his volley of spells, will this affect the probability of my troops retreating (providing there are other commanders who will stay behind).

As long as there is a commander with the appropriate leadership type, the units will not be affected. For mindless undead, they will dissolve until they reach the current leadership limit.

Also, does a commander's command value have any direct influence on whether his troops will retreat?

The commander's value does not affect the morale calculations as far as I know. Where the effect does show up is that a commander that can lead 50 troops can create a larger squad than one who can only lead 20, and this squad will be harder to rout.

I sometimes see troops who have routed return to battle (though they then seem to route easily), without any spells being cast. Why?

Are you sure that they were routing and not moving to attack a unit that was behind them? I'm not sure that I've seen the behaviour you describe otherwise.

Finally, I have read that the probability of a troop retreating is lower if he or she is a member of a larger unit. How does that factor in to the retreat calculation?

I believe that when the average morale loss of the squad is greater than the number of units in the squad, the the entire squad will rout.

A unit is all the troops in one "row" under a commander, right?

Correct.