The Martin Model 167 light reconnaissance bomber was designed for the US Army as XA-22. It lost out to the Douglas DB-7 Boston, which became the A-20 Havoc and the North American NA-40, which was eventually developed into the B-25 Mitchell. The Martin design was developed for production to fill orders from the French, who called it the Glenn, or just "Glenn Martin bomber." Later orders from the British were delivered as Maryland bombers.

The Martin Model 187 was developed from the Maryland as the A-30 Baltimore.

Both planes get little respect nowadays, but they were of much value in the Mediterranean theater — to both sides in North Africa. With the fall of France, some planes escaped to areas outside Vichy-German control while others were retained by the Vichy government. The Vichy planes fought against the Allies in the early stages of the North African campaign.