The troops used a secret word "Kane" to distinguish friends from foes; when a man said "Kane" to the other, if he couldn't reply with "Kane," he was regarded as an enemy.
敵陣に突入した軍勢は、敵味方の区別のために「金」を合言葉とし、「金」と呼びかけて「金」と答えれば味方、答えなければ敵とみなした。