Yes, but that doesn't exist for gameblance reasons. It would make archers dramatically more resilient than melee troops. Right now, I think the balance is perfect - archers have a great survivability as long as your melee troops hold. But once the frontlines break and they enter melee, they get destroyed.
but it's not 'realistic', nor is it 'fun' for the archer players. And there are cases where you do want your archers to hold--hence the marshal checkbox option.
