Second World War
The Royal Armoured Corps was formed on 4 April 1939 and it incorporated regular army cavalry regiments and yeomanry regiments that were equipped with armoured vehicles and tanks. It also included the battalions of the Royal Tank Regiment.
To manage the training requirements for the men within these units, Training Regiments of the Royal Armoured Corps were established. As of June 1940, these produced 128 trained men per month. A full transcript of the War Establishment is available for PDF download.