Armoured fighting vehicle
Different types of armour were used to protect armoured trains from attack. In addition to various metal plates, concrete and sandbags were used in some cases on armoured trains.
Armoured trains were sometimes escorted by a kind of rail-tank called a draisine. One such example was the Italian 'Littorina' armoured trolley, which had a cab in the front and rear, each with a control set so it could be driven down the tracks in either direction. Littorina mounted two dual 7.92mm MG13 machine gun turrets from Panzer I light tanks.

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Sources: Gougaud, Alain (1987). L'aube de la gloire: les autos mitrailleuses et les chars français pendant la Grande Guerre, histoire technique et militaire, arme blindée, cavalerie, chars, Musée des blindés (in French). Issy-les-Moulineaux: Société OCEBUR. ISBN 978-2-904255-02-1.
Macksey, Kenneth (1980). The Guinness Book of Tank Facts and Feats. Guinness Superlatives Limited. ISBN 0-85112-204-3.
Margiotta, Franklin D., ed. (1996). Brassey's encyclopedia of land forces and warfare. Brassey's. ISBN 1-57488-087-X. Retrieved 19 February 2011.

External links: 
US Wheeled armoured fighting vehicles