The War Department was the United Kingdom government department responsible for the supply of equipment to the armed forces of the United Kingdom and the pursuance of military activity. In 1857, it became the War Office. Within the War Office, the name 'War Department' remained in use to describe the military transport services of the War Department Fleet and the War Department Railways.
In 1794, the position of Secretary of State for War was created. The Secretary's department was at first unofficially known as the War Department. Colonial affairs were later added and it became the Colony Department. After the outbreak of war with revolutionary France it became Colony and War Department and on the restoration of peace in 1815 the Colonial Department. In February 1855, the offices of the Secretary of State for War, and Secretary at War were merged and the new department and became the War Department once again until 1857 when it became the War Office. In 1964, the department became the Ministry of Defence.
One aspect of the War Department's work was the supply of locomotives and rolling stock for use on railways in the United Kingdom, other parts of the British Empire, and in theatres of conflict.
In World War I, the War Department ran the War Department Light Railways which were a system of narrow gauge trench railways used for the supply of ammunition and stores, the transport of troops and the evacuation of the wounded.
In World War II, large numbers of steam locomotives were produced, as well as some diesel locomotives, of varying gauges to suit the area of planned operation. After the end of the war, these locomotives were largely disposed of to various railways around the world, though some were retained for peacetime use on UK military railways. Of those that were sold, examples of three types ended up as part of the British Railways fleet (where they were often referred to as 'Austerity' locos):
For more details see Steam locomotives of British Railways.
The steam locomotives of British Railways were used by British Railways over the period 1948–1968. The vast majority of these were inherited from its four constituent companies, the "Big Four".
The London, Midland and Scottish Railway (LMS) Stanier Class 8F is a class of steam locomotives designed for hauling heavy freight. 852 were built between 1935 and 1946, as a freight version of William Stanier's successful Black Five, and the class saw extensive service overseas during and after the Second World War.
The War Department (WD) "Austerity" 2-8-0 is a type of heavy freight steam locomotive that was introduced in 1943 for war service. A total of 935 were built, making this one of the most-produced classes of British steam locomotive. They were nicknamed Ozzies by the railwaymen.
The Great Western Railway (GWR) 2884 Class is a class of 2-8-0 steam locomotive. They were Collett's development of Churchward's earlier 2800 Class and are sometimes regarded as belonging to that class.
The United States Army Transportation Corps S160 Class is a class of 2-8-0 Consolidation steam locomotive, designed for heavy freight work in Europe during World War II. A total of 2,120 were built and they worked on railroads across much of the world, including Africa, Asia, all of Europe and South America.
The War Department (WD) "Austerity" 2-10-0 is a type of heavy freight steam locomotive that was introduced during the Second World War in 1943.
The Hunslet Austerity 0-6-0ST is a class of steam locomotive designed by Hunslet Engine Company for shunting. The class became the standard British shunting locomotive during the Second World War, and production continued until 1964 at various locomotive manufacturers.
The London and North Eastern Railway (LNER) J94 Class is a class of steam locomotive that was formed when 75 former "Austerity" 0-6-0STs were purchased by the LNER in 1946 from the War Department.
The SR USA class are some ex-United States Army Transportation Corps S100 Class steam locomotives purchased and adapted by the Southern Railway (SR) after the end of the Second World War to replace the LSWR B4 class then working in Southampton Docks. SR staff nicknamed them "Yank Tanks".
The British Railways (BR) ex-WD Austerity 2-10-0 Class was a class of 25 2-10-0 steam locomotives of the WD Austerity 2-10-0 type purchased in 1948 from the War Department.
The War Department ex-LMS Fowler Class 3F consisted of 8 LMS Fowler Class 3F 0-6-0T steam locomotives requisitioned in 1940 from the London Midland and Scottish Railway (LMS).
The Ferrovie dello StatoClass 737 was a class of steam locomotive which consisted of 15 ex-British War Department (WD) 2-8-0 locomotives of the LMS Stanier Class 8F type which were purchased in 1946.
War Department "Austerity" 2-8-0, WD No. 79257 is a preserved British steam locomotive. It is the only survivor of its type. Originally built by the Vulcan Foundry in 1945, works No. 5200, it was given the WD No. 79257. During the liberation of Europe, it was transferred to mainland Europe with the British Army.
Palestine Railways was a government-owned railway company that ran all public railways in the League of Nations mandate territory of Palestine from 1920 until 1948. Its main line linked El Kantara in Egypt with Haifa. Branches served Jaffa, Jerusalem, Acre and the Jezreel Valley.
The British Railways (BR) ex-WD Austerity 2-8-0 was a class of 733 2-8-0 steam locomotives designed for heavy freight. These locomotives of the WD Austerity 2-8-0 type had been constructed by the War Department, as war locomotives 1943–1945. After the war, they were surplus and so in 1946 the LNER bought 200 of them, classifying them as LNER Class O7, and by the end of 1947 when the LNER was nationalised, had taken another 278 O7s on loan. After nationalisation, BR purchased 533 more 2-8-0s, including all of those on loan, giving a class total of 733. As many of these needed overhauling before being put to work, they were activated slowly. BR chose to reclassify from LNER Class O7 and renumbered them from the 6xxxx LNER series in the 90000–732 series for BR standard designs.
The Kowloon-Canton Railway class of ex-WD Austerity 2-8-0 was a class of 12 steam locomotives, ex-WD Austerity 2-8-0. Unlike other KCR locomotives, they apparently did not receive a class letter designation.
The South African Railways Class 7A 4-8-0 of 1896 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The Palestine Railways H class was a type of standard gauge mixed traffic steam locomotive on the Palestine Military Railway and its civilian successors Palestine Railways and Israel Railways. The PMR introduced the class in 1919 and Israel Railways withdrew the last ones in 1960.
The LNWR 5ft 6in Tank was a class of 160 passenger 2-4-2T locomotives manufactured by the London and North Western Railway in their Crewe Works between 1890 and 1897. The "5ft 6in" in the title referred to the diameter of the driving wheels – although the stated dimension was for the wheel centres – the nominal diameter including the tyres was 5 ft 8+1⁄2 in (1,740 mm).
The NS 4300 was a series of steam locomotives of the Dutch Railways (NS), taken over from the British War Department.