[Kristoffer O]

I have come across strange incidents where commanders sometimes stay and fight. I have noticed this only when all soldiers are killed in the first round of battle or something soimilar. It was long since Last time and I'm not sure what happened. IIRC it was a PD battle.

Commanders rout when all troops are lost. If you summon one skeleton (twin spear is working now) and the skeleton is killed you have lost all your soldiers and you will therefore retreat.