The most notable contribution of the MB-2 was
its use in the ship bombing trials in 1921. Flying out of Langley
Field, Virginia, under the command of Brigadier General Billy Mitchell,
the Martin Bombers sunk a destroyer, cruiser, and a battleship;
and proved the worth of aerial bombardment.
Martin MB-2
(NBS-1)
The Martin MB-2 was the first U.S.-designed bomber produced in large numbers. It was first ordered in June 1920 and replaced the small number of British Handley-Page O-400 and Italian Caproni bombers produced in the United States under license during WWI.