Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. During the First World War sixteen American Peerless trucks had been modified by the British to serve as armoured cars. These were relatively primitive designs with open backs armed with a Pom-pom gun and a machine gun, and were delivered to the British army in 1915. They were used also by the Tsarist Russian Army as self-propelled anti-aircraft guns. After the war a new design was needed to replace armoured cars that had been worn out. As a result the Peerless Armoured Car design was developed in 1919. It was based on the chassis of the Peerless three ton lorry, with an armoured body built by the Austin Motor Company.