In forming the advance guard of a command smaller than a brigade, the
foregoing distribution is modified, depending upon the situation. A
company or troop usually sends forward only a point, a battalion or
squadron, an advance party; but a battalion or squadron at war strength
should put a company or troop in the advance guard and a regiment should
put a battalion or squadron, if an enemy is liable to be met. Whenever
the advance guard is less than a battalion, there is no reserve.