Joab

Joab son of Zeruiah was David's nephew and the commanding general of his armies throughout most of his reign, one of the most powerful and politically astute figures of the period. A brilliant military commander, he conquered Jerusalem (2 Samuel 5:8), defeated Ammon and other enemies, and twice saved the kingdom from revolt. Yet he acted ruthlessly when he judged it necessary: he killed Abner, his rival general, treacherously (2 Samuel 3:27), slew Absalom against David's orders (2 Samuel 18:14), and murdered Amasa (2 Samuel 20:10). He supported Adonijah's claim to the throne rather than Solomon's, for which Solomon had him executed at the altar (1 Kings 2:28–34). His career illustrates the tension between effective military service and the moral boundaries demanded by covenant loyalty.