Flares are sent up from each section.
56.—Trench Mortars.
Trench mortars fire bombs with the first volley.
57.—How to repulse an attack.
If the attack materializes, repeat volleys and trench mortar discharge and open fire with the machine guns.
(On dark nights, in covered terrain, the machine guns should be fired with the first volley.)
58.—Use of hand grenades.
Hand grenades should be thrown as soon as the enemy is within 30 yards.
The grenadiers of the odd number squads should aim to throw their grenades upon the assailants while those of the even number squads should try to establish a barrage by throwing behind the assailants.
59.—Use of trench mortars.