Mercenary knights are sometimes hired for a campaign. Mercenary engineers, crossbowmen, and other infantry might be rushed in to a city that was expected to stand siege. But these cases are temporary and of comparatively small scale. The Order has a permanent force of mercenary turcopoles. Turcopoles are for the most part natives of Outremer, raised and trained locally. They serve as light cavalry: skirmishers, scouts, and mounted archers, and sometimes ride as a second line in a charge, to back up the knights and sergeants.