"Vikings Art et science militaires." . . "Europe" . . "Wikingowie sztuka i nauka wojenna." . . . . "Northmen" . . "Wikingowie." . . "Skandynawia (region)" . . "Varègues Art et science militaires." . . . . . . . . . . . . . "Norse warfare : the unconventional battle strategies of the ancient Vikings" . . . . . . "History" . . . . . . . . . "Scandinavia" . .