This large watchtower has been guarding the borderline of the kingdom for years by warning others when the enemy has crossed into His Highness' Lands. If this watchtower was ever captured, the enemy could march all the up to the Castle. It is considered an honor to have guarding duties here.
Unless you're these guys.
After spending day after day looking out for enemies, these new recruits have grown rather bored. So they decided to just take a break all at once, but that now leaves an opening for a horde of Orcs to slip through...