During the time of Jehoram (King of Judah), Edom rebelled and broke away from their influence. To suppress this, King Jehoram led his army to Sail and engaged in battle. In this war, Jehoram was victorious, but he could not prevent Edom's rebellion.
2 Kings 8:20In the days of Jehoram, Edom revolted from under the hand of Judah and set up a king over themselves.2 Kings 8:21So Jehoram went to Sail with all his chariots, and he rose up by night and struck the Edomites who had surrounded him and the commanders of the chariots, and the people fled to their tents.2 Kings 8:22So Edom revolted from under the hand of Judah to this day. At the same time Libnah also revolted.