BRPever
The problem ignores the physical issues involved. The layout of the battlefield, the weaponry the enemy has deployed, etc. This implies that the decision he is to make is based off of emotion. You're in a hole and it's filling up with quicksand. The hole is surrounded by hungry wolves. Do you wait to drown or climb out, knowing you will be torn apart?
Guerrilla warfare and feed off the enemy supply trains and bleed them dry in small unit actions so your troops can handle small cell logistics instead of dying in bulk. once they have sufficient supplies, let the women and children bug out while volunteers keep to the shadow and use terror tactics. Give the enemy a win that wish they never had