The Barbary pirates had a direct Christian counterpart in the military order of the Knights of Saint John that operated first out of Rhodes and after 1530 Malta, though they were less numerous and took fewer slaves. Both sides waged war against the respective enemies of their faith, and both used galleys as their primary weapons. Both sides also used captured or bought galley slaves to man the oars of their ships; the Muslims relying mostly on captured Christians, the Christians using a mix of Muslim slaves, Christian convicts and a small contingency of "buonavoglie", free men who out of desperation or poverty had taken to rowing.