The following is the results of your search for rereward.
Rereward: (Joshua 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
(Numbers 10:25) comp.
(1 Samuel 29:2; Isaiah 52:12; 58:8)