M10 smoke tank

The M10 smoke tank, also called the Smoke Curtain Installation, was an under-wing tank used by the United States Army Air Forces to lay smoke screens or disperse chemical agents such as tear gas, holding up to thirty gallons and capable of producing a smoke screen roughly two thousand feet long. It was carried externally on aircraft such as the Douglas A-20 Havoc, and it saw combat use in the Second World War, including laying an aerial smoke screen during the airdrop of the 503rd Parachute Infantry Regiment of the United States Army at Nadzab, New Guinea, in 1943.