'Captain' in the Bible

Now Abner the son of Ner, captain of Saul's army, had taken Ishbosheth the son of Saul, and brought him over to Mahanaim;

Hadadezer sent, and brought out the Syrians who were beyond the River: and they came to Helam, with Shobach the captain of the army of Hadadezer at their head.

The Syrians fled before Israel; and David killed of the Syrians [the men of] seven hundred chariots, and forty thousand horsemen, and struck Shobach the captain of their army, so that he died there.

Say to Amasa, 'Aren't you my bone and my flesh? God do so to me, and more also, if you aren't captain of the army before me continually in the room of Joab.'"

Wasn't he most honorable of the three? therefore he was made their captain: however he didn't attain to the [first] three.

The king said to Joab the captain of the army, who was with him, "Now go back and forth through all the tribes of Israel, from Dan even to Beersheba, and number the people, that I may know the sum of the people."