ADVANCE-Guard, or Van-Guard, is the first line or division of an army ranged or marching in battle-array;that part which is next the enemy, or which marches first toward them. See LINE.

The whole body of an army is divided into Advance-Guard, Rear-Guard, and Main Body. See ARMY, etc.

The word is sometimes also applied to a small party of horse, as 15 or 20, commanded by a Lieutenant, beyond and in sight of, the Main Guard.