So Jehoram crossed into Edom with his officers and all his chariots. When the Edomites surrounded him and his chariot commanders, he rose up and attacked by night.
Jehoram goes into Edom with his officers and chariots and strikes at night after the Edomites surround him.
It describes his attempt to answer the revolt militarily.
8In the days of Jehoram, Edom rebelled against the hand of Judah and appointed their own king. 9So Jehoram crossed into Edom with his officers and all his chariots. When the Edomites surrounded him and his chariot commanders, he rose up and attacked by night. 10So to this day Edom has been in rebellion against the hand of Judah. Likewise, Libnah rebelled against his hand at the same time, because Jehoram had forsaken the LORD, the God of his fathers. 11Jehoram had also built high places on the hills of Judah; he had caused the people of Jerusalem to prostitute themselves and had led Judah astray.