Amasa … died: This was the second time Joab killed an enemy commander through deceit. The first was Abner (2 Samuel 3:26–27). David tried twice to unite enemy groups by including the enemy's military leader (2 Samuel 3:6–13; 17:25; 19:13). Both times, Joab ruined David's plans by deceitfully murdering the rival commander (2 Samuel 3:22–30).