Withdraw option

[BBrus]

A good alternative could be to agree to ceasefire terms with your opponent before starting the battle. Such as adding a rule that says that once a side controls all victory points, the side who is losing may ask for a ceasefire that must be accepted within x turns.

I only see this working in QB, though. Scenarios involve reinforcements and may heavily unbalance the outcome of the battle if the losing side has reinforcements inbound.