The Mongols have sent a traitor into the Japanese camp. If they can't be defeated by the horde, can they be defeated by an enemy within?
instead of trying to protect 
both the people and a place.
بدلاً من محاولة حماية الناس والمكان معاً
invece che proteggerli entrambi.
em vez de tentar proteger tanto 
o lugar quanto as pessoas.
Наверное, это в корне неверно.