'Disguised' in the Bible

The king of Israel said to Jehoshaphat, “I will disguise myself and go into battle, but you put on your robes.” So the king of Israel disguised himself, and they went into battle.

However, Josiah would not turn away from him, but disguised himself in order to make war with him; nor did he listen to the words of Neco from the mouth of God, but came to make war on the plain of Megiddo.