'Chief' in the Bible

Then Abner had a talk with the chief men of Israel, saying, In the past it was your desire to make David your king: so now, do it:

And the king said to his servants, Do you not see that a chief and a great man has come to his end today in Israel?

And Joab, the son of Zeruiah, was chief of the army; and Jehoshaphat, the son of Ahilud, was keeper of the records;

And the chief men of his house got up and went to his side to make him get up from the earth, but he would not; and he would not take food with them.

And say to Amasa, Are you not my bone and my flesh? May God's punishment be on me, if I do not make you chief of the army before me at all times in place of Joab!

These are the names of David's men of war: Ishbaal the Hachmonite, chief of the three; his axe was lifted up against eight hundred put to death at one time.

And Abishai, the brother of Joab, the son of Zeruiah, was chief of the thirty. He put to death three hundred with his spear, and he got for himself a name among the thirty.