medical section in rear of the foot elements of the battalion, examines such individuals. He returns permits to the company commanders concerned, showing thereon the disposition of soldiers exam- ined.
e. March collecting posts are established by the collecting company of the division medical battalion, evacuation being by motor ambulance. When higher headquarters announce that such posts are to be available for a particular march, the regimental sur- geon advises battalion surgeons, who utilize these posts to relieve the unit of noneffectives.
f. Advance, flank, and rear guards are furnished an appropriate detachment from the medical section of the battalion concerned when the security ele- ments are sufficiently large to warrant such action. This detachment may be augmented by additional personnel, supplies, and transportation from the medical detachment headquarters section or from the division medical battalion.
40. MEDICAL SERVICE DURING APPROACH MARCH AND IN ASSEMBLY AREAS. a. During the approach march, company aid men closely follow their assigned companies. Litter bearers are de- ployed to cover the widening battalion front. The remainder of the section marches along the axis of advance in extended order, hand-carrying aid sta- tion equipment, if necessary. The battalion surgeon remains with the battalion commander as long as possible in order to keep himself informed of de- velopments in the situation. (See FM 7-20.)