Amasa was a military leader in ancient Israel, known for his role during the reign of King David. He was appointed as the commander of the army, taking over from Joab, David's previous military chief. Amasa is mentioned in the biblical books of 2 Samuel and 1 Chronicles, where his leadership and eventual downfall are detailed. His most notable moment came during the rebellion led by Sheba, a Benjamite. Amasa was tasked with gathering the troops to confront Sheba, but he was ultimately killed by Joab, who sought to regain his position. Amasa's story highlights the complexities of loyalty and power in biblical narratives.