An aeroplane operating
against armies in the field would, therefore, probably use shrapnel, an explosive shell filled with hundreds of
bullets and equipped with a time - fuse in such manner that it can be exploded above bodies of troops on the march, supports, reserves, wagon
trains, camps, etc. shrapnel is considered one of the most effective projectiles used in modern warfare, and it does not require a military expert to imagine the havoc it would work on a body of troops en masse.