'Commanders' in the Bible

He will appoint for himself commanders of thousands and commanders of fifties, and [those] {to do his plowing} and to reap his harvest, and [those] to make weapons of war and the equipment for his chariots.

Then the commanders of [the] Philistines went out [for battle], and as often as they went out, David succeeded more than all the servants of Saul, and his name became very esteemed.

Then Saul said to the servants who [were] standing around him, "Please listen, {Benjaminites}! Will the son of Jesse give you all fields and vineyards? Will he make all of you commanders of thousands and commanders of hundreds?

Then the commanders of [the] Philistines said, "What [are] these Hebrews [doing here]?" And Achish said to the commanders of [the] Philistines, "Is this not David, the servant of Saul, the king of Israel, who has been with me {for days and years}? I have not found anything [threatening] in him from the day of his desertion until this day!"

But the commanders of [the] Philistines were angry with him and they said to him, "Send the man back so that he might return to his place where you have assigned him! But he will not go down with us into the battle, so that he does not become an adversary to us in the battle. By what could this fellow make himself favorable to his lord? Is it not with the heads of these men?

And Achish answered and said to David, "I know that you [are] good in my eyes, like an angel of God! However, the commanders of [the] Philistines have said, 'He must not go up with us into the battle.'