(renamed Wolfsburg after the war), which had been purpose-built for the factory workers. This factory had only produced a handful of cars by the time war started in 1939. None were actually delivered to any holder of the completed saving stamp books, though one Type 1 Cabriolet was presented to Hitler on 20 April 1944 (his 55th birthday). 1939–1944: Wartime production and Nazi concentration camp labour War changed production to military vehicles—the Type 82 Kübelwagen ("Bucket car") utility vehicle (VW's most common wartime model), and the amphibious Schwimmwagen—manufactured for German forces. One of the first foreigners to drive a Volkswagen was the American war correspondent Ernie Pyle, who had the use of a captured Volkswagen for a few days after the Allied victory in Tunisia in May 1943. As was common with much of the production in Nazi Germany during the war, slave labour was utilised in the Volkswagen plant, e.g. from Arbeitsdorf concentration camp. The company would admit in 1998 that it used 15,000 slaves during the war effort. German historians estimated that 80% of Volkswagen's wartime workforce was slave labour. Many of the slaves were reported to have been supplied from the concentration camps upon request from plant managers. A lawsuit was filed in 1998 by survivors for restitution for the forced labour. Volkswagen would set up a voluntary restitution fund. 1945–1948: British military intervention In April 1945, KdF-Stadt and its heavily bombed factory were captured by the United States armed forces and subsequently handed over to the British, within whose occupation zone the town and factory fell. The factory was placed under the control of British Army officer Major Ivan Hirst, REME, a civilian Military Governor with the occupying forces. At first, one plan was to use it for military vehicle maintenance, and possibly dismantle and ship it to Britain. Since it had been used for military production, (though not of KdF-Wagens) and had been in Hirst's words, a "political animal" rather than a commercial enterprise – technically making it liable for destruction under the terms of the Potsdam Agreement – the equipment could have been salvaged as war reparations. Allied dismantling policy changed in late 1946 to mid-1947, though heavy industry continued to be dismantled until 1951. One of the factory's wartime 'KdF-Wagen' cars had been taken to the factory for repairs and abandoned there. Hirst had it repainted green and demonstrated it to British Army