Labour Corps (United Kingdom)
The Labour Corps was a British Army force formed in 1917 for manual and skilled labour on the Western Front and Salonika during the First World War. In previous centuries the British Army had fulfilled this role through the Royal Pioneer Corps (1762–1763), the Corps of Pioneers (1795–1800) and the Army Works Corps (1855-c.1856).
Source: Wikipedia — Labour Corps (United Kingdom) (CC BY-SA 4.0)