Rereward
From Textus Receptus
Webster's 1828 English Dictionary
RE'RE-WARD, n. [rear and ward.] The part of an army that marches in the rear, as the guard; the rear guard. [The latter othography is to be preferred.] Num 10. Isa 52.
Easton's 1897 Bible Dictionary
(Josh. 6:9), the troops in the rear of an army on the march, the rear-guard. This word is a corruption of the French arriere-garde. During the wilderness march the tribe of Dan formed the rear-guard (Num. 10:25; comp. 1 Sam. 29:2; Isa. 52:12; 58:8).