Read 1 Kings 16:16 Using Other Translations
And the people that were encamped heard say, Zimri hath conspired, and hath also slain the king: wherefore all Israel made Omri, the captain of the host, king over Israel that day in the camp.
and the troops who were encamped heard it said, "Zimri has conspired, and he has killed the king." Therefore all Israel made Omri, the commander of the army, king over Israel that day in the camp.
When they heard that Zimri had committed treason and had assassinated the king, that very day they chose Omri, commander of the army, as the new king of Israel.