It may seem strange that the rulers were willing to entrust their lives rather yesterday's enemies than to their compatriots. Like Alexander the Great, the Roman Emperor Constantius II did not hesitate to fill his personal guard prisoners Franks. A hypochondriac suspected of Caligula guarded by guards from Batavia, one of the Germanic tribes conquered. And if Julius Caesar was surrounded by Spanish guards, the Spanish kings in turn protected by guards from the Burgundians and Germans. At the same time, we would be in vain to look for the same Burgundians, the subjects of the French king, in his guard. We would see where foreigners recruited outside France: German, Swiss and Scots. Incidentally, the famous novel by Sir Walter Scott's "Quentin Durward" is dedicated to one of these Scots, held in the personal protection of the French king.