Imperial Armour Starting in 2015, Forgeworld stopped using the `Volume X' notation, using just Imperial Armour and the title of the book. The rules contained in the following books are no longer valid, having been superseded by later editions of the "Warhammer 40,000" game and other Imperial Armour books. <br> Forge World has also published two Model Masterclass books, which focus on painting the often very large and extensive models they produce: Imperial Armour Imperial Armour is a series of rules supplements to the "Warhammer 40,000" table-top game, along with an associated range of vehicle-size resin model kits. Both are produced by
Imperial units Imperial units The system of imperial units or the imperial system (also known as British Imperial or Exchequer Standards of 1825) is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced. The Imperial units replaced the Winchester Standards, which were in effect from 1588 to 1825. The system came into official use across the British Empire. By the late 20th century, most nations of the former empire had officially adopted the metric system as their main system of measurement, although some imperial units are still used in the