He noticed at once that discipline was slack: the Danes had the self-confidence of conquerors, and their security precautions were casual.

上发现丹麦军纪律，们以征服者居，安全措施。

He found their entire army living in careless security, and so he determined to make a sudden and bold attack on them, to try and rid his country once more of these cruel invaders.

发现丹麦军队纪律，因此决定对们采取大胆的突袭，把这些残酷的侵略者赶出英格兰。