How does a wizard fight an army?

[Tanarii]

RAW there is no such thing as morale rules AFAIK- so the army is hardened numbers marching forwards to kill said Wizard no matter what the cost. Sounds a wee bit unrealistic but rolling with it.

DMG page 273. It's an optional rule at the DMs discretion.

And even if the DM doesn't use the optional rule, that doesn't mean that she can't adjudicate when enemies break based on her own judgement.

[Vaz]

Its a good job we have mass combat ua... Ah, wait. Probs best not to do so...