Machine gun

the long version

"The machine gun had a dramatic effect on the conduct of warfare; one or two men operating a single machine could produce the same weight of fire as a squadron of rifles, and when used against an inferior enemy, the effect could be devastating. During the First World War, the use of the machine gun in conjunction with massed barbed wire and other obstacles put an end to battlefield mobility until new weapons and tactics could be devised. This book describes the development of the machine gun from the earliest models to the present day."--Global Books in Print.