i.e. As the life-guard of Achish, as he had promised, 1 Samuel 28:2, Achish being, as it seems, the general of the army.
Related Commentaries of 1 Samuel 29:2
1 Samuel 29:2
2 And the lords of the Philistines passed on by hundreds, and by thousands: but David and his men passed on in the rereward with Achish.