Iran with four Garratt 4-8-2+2-8-4 articulated locomotives (works numbers 6787–6890). In 1938 these became class 86.01. Until the British invasion of Iran in 1941 (see below, Anglo-Soviet invasion of Iran) these Garratts seem to have been the only standard gauge British locomotives in Iran. German manufacturers supplied 65 steam locomotives for the opening of the line in 1938. 49 were 2-8-0 Consolidations: 24 from Krupp forming class 41.11, 16 from Henschel & Son forming class 41.35 and nine from Maschinenfabrik Esslingen forming class 41.51. The other 16 were Henschel 2-10-0 Decapods forming class 51.01. The Trans-Iranian acquired 10 of the locomotives that Kampsax had used to build the line. These were Gölsdorf two-cylinder compound 0-10-0 freight locomotives built between 1909 and 1915 as Austrian State Railways class 80 by Wiener Neustädter Lokomotivfabrik, Lokomotivfabrik Floridsdorf and Lokomotivfabrik der StEG in Vienna and by Breitfeld-Daněk in Bohemia. When the Iranian railway introduced its new numbering system in 1938 the Gölsdorf 0-10-0s kept their original Austrian numbers. World War II British and Soviet operation 1941–42 The British and Russians initially stated their reason for invading Iran was the Iranian government's failure to rid the country of Germans, who supposedly were planning an eventual coup d'etat. Yet there were other reasons for the invasion, and the Trans-Iranian Railways key location as part of the so-called "Persian Corridor" was one of the primary reasons for the Anglo-Soviet invasion of Iran in World War II. Despite Reza Shah's attempts to remain neutral, the allies decided it would be most effective to remove Reza Shah from the throne, using his young son, instead to assist in their use of the Trans-Iranian Railway to transport oil to Britain, and supplies to the Soviet Union. In August 1941 Soviet, British and British Indian forces invaded Iran to protect their oil supply in Iran and to secure the Persian Corridor supply route from the Persian Gulf to the Central Asian republics of the Soviet Union. In September 1941 the Allies took over operation of the Trans-Iranian Railway: British and Empire Royal Engineers (RE) commanded by Brigadier Godfrey D. Rhodes operating the Southern Division between Tehran and the port of Bandar Shahpur on the Persian Gulf and the Soviet Army operating the Northern Division between Tehran and the port of Bandar Shah on the Caspian Sea. The RE expanded freight capacity by building new railway yards at Bandar Shahpur, Ahvaz and