World War I came as a surprise to arms industries that had to produce many thousands of weapons in a short space of time. Technical progress was also rapid and many new designs had to be approved and produced. The author traces the history and development and use of weapons by the Allied forces in this companion volume to Central Powers' Small Arms of the World. The book covers the weapons of Great Britain, France, Belgium, Italy, Russia, Greece, Japan and the US and offers detailed specifications of rifles, handguns and machine-guns.