Fort Charles is a stronghold with monarchical overtones located in the bustling harbor town of Port Royal, standing on a bluff, looming over the harbour. This fort is the base of operations for the British Royal Navy. 'Drill'em 'till they drop' is apparently the local motto, and the camp commandant frowns on camp followers - which means he's not doing it right, if at all.
As with any military, there are ways around, if you grease the right palms or provide service in kind. Scoundrels in uniform are no kind of rarity.