Donald Wills Douglas graduated US Naval Academy, graduated/lectured MIT, then chief engineer Glenn L. Martin. Moved LA and with sportsman David R. Davis formed Davis-Douglas Co. 22 July 1920; 5 July 1921 formed The Douglas Co., 2435 Wilshire Blvd, Santa Monica, great success with DT torpedo bombers, DWC world cruisers, M-2 and M-4 mailplanes, C-1 Army transport, T2D twin-engined torpedo land/seaplane, and above all O-2 observation aircraft, larger numbers than any other US between-wars type (over 900).