Martin Maryland - Free France users

When France signed the armistice with Germany, many Frenchmen refused to accept it and crossed the Strait of Dover and joined General De Gaulle's troops. Among them, there were many pilots that fled with their Martin 167F and formed the embryo of the Forces Aériennes Françaises Libres (Free France's Air Force) which were notably used against U-Boats on the waters of the North Sea. That's why some of them were adapted with depth charges and even torpedoes.
The Free France Air Force kept their Martins 167F until 1945 when they were replaced by the Martin B-26 Marauder.
They served practically in every front where Free France was involved. From the early East African campaign, to the Mediterranean and European campaign passing through the Syrian campaign.

Sources:
1. https://fr.wikipedia.org/wiki/Martin_167 (translated)
2. http://aerostories2.free.fr/acrobat/AA/aden.pdf (translated)

Martin 167F - Vichy French users

After the Franco-German armistice, l'Armée de l'Air de Vichy (Vichy France's Air Force) had some squadrons equiped with the Martin 167F, serving mainly in the reconnaissance role.
Those airplanes were notably used against the allies in the North African campaign, at the strait of Gibraltar. When Operation Torch was launched, some aerial combat against the Martin 167F equipped units took place, mainly against the Grumman Martlet (the name that the Fleet Air Arm gave to the Grumman F4F Wildcat). However the French bombers were outnumbered by the Allied's air forces and they suffered heavy casualties as they were easy targets thanks to their identification red-yellow stripes. Some of them served with the Aéronavale, the French Navy's air arm.

Sources:
1. https://fr.wikipedia.org/wiki/Martin_167 (translated)
2. AJ-Press - Monografie Lotnicze 96 - Martin 167 Maryland (translated)

Martin 167F - French Army Users

After a weekend off, we're back, dealing with the French users of this American bomber.
The Armée de l'Air (French Air Force) ordered various types of American airplanes during the late 1930s, among them 200 Martin 167F (which was a version designed specifically for France with for instance metric equipment or the 0,30 FN built Browning machine gun. It entered service with the Armée de l'Air in early 1940 (when they were originally expected to be delivered in early 1939) due to the American arms embargo on weapons export that held the airplanes for various months.
By the time of the German invasion of France, there were only four Groupes de bombardement (Bomber squadrons) equipped with the 167F and they were sent to the battlefield where they served quite well with their speed and maneouvrability with just a 4% loss rate.
Just before the French Armistice of June 1940, those squadrons equipped with the 167F were sent to the French North Africa to make them escape and avoid being taken by the Germans. Apparently one of them landed in Spain were it was interned and tested by the Spanish regime and another one landed in Gibraltar where it was repainted with Royal Air Force's colours.

Sources:
1. https://en.wikipedia.org/wiki/Martin_Maryland
2. AJ-Press - Monografie Lotnicze 96 - Martin 167 Maryland (translated)

Martin Maryland - British users

Just before the fall of France in June 1940, a pact was signed to hand over the remaining 75 planes that were intended to be delivered to France to the United Kingdom, so from those seventy-five, thirty two of them were already completed and, after being handed over, they were converted to British standards having converted their engines from Wright R-1280 Cyclone 9 to the Pratt & Whitney Twin Wasp as well as the changement in defensive weaponry. The other forty three were finished in British standards and received the designation of Martin Maryland Mk.I. One hundred and fifty more of them were ordered by the British with a two-speed superchargers on their twin-wasp engines and were designated Martin Maryland Mk.II.
They were delivered mainly to the Mediterranean Theatre of Operations, mostly in Egypt and Malta in 1941 just in time to take part in the fighting there. As they were faster than the Bristol Blenheim, the Royal Air Force, employed them mainly in the photo reconnaissance. In fact it was a Maryland that photographed the Italian Fleet at the port of Taranto before and after the devastating raid of 11th November 1940.
Only three of them served with the Fleet Air Arm, and were used mainly for target towing. However, on 22nd May 1941 a Maryland of 771 Naval Air Squadron based at Hatston in the Orkney islands, reported that the German battleship Bismarck had left the Norwegian port of Bergen and started what would become, her last raid into the Atlantic ocean.

Sources:
1. https://en.wikipedia.org/wiki/Martin_Maryland
2. http://www.fleetairarmarchive.net/aircraft/maryland.htm

Martin Maryland - South African users

Today it's the time for a fine American light bomber that was used by many countries during World War 2, except for the USA itself.
It was named Maryland by the British and it served mainly in the African Theatre of operations both with the Royal Air Force and the South African Air Force. Those serving with the RAF or any Commonwealth country, were equipped with the Vickers K gun.
It fullfiled both reconnaissance and light bomber role, oftenly by the same squadrons. However, generally, the British squadrons used them for recon duties while the South African ones employed them in the light bomber ones.
The SAAF had three Maryland Squadrons, No.16, No. 21 and No. 24.
The Marylands of the No.16 Squadron SAAF saw combat first during the Operation Ironclad, the successful invasion of Madagascar in 1942 and it was disbanded the next year after the Italian capitulation. Those of the No.21 Squadron SAAF served in the East African Campaign against Italian forces in Ethiopia and later in the North African Theatre of operations until November 1943 when they were replaced by the more modern Martin Baltimore.
They also saw service briefly with the No.24 Squadron SAAF as they were formed in March 1941 and took part in the North African campaign alongside with airplanes of the No.39 Squadron RAF performing tactical raids, until, approximately one year later, they were replaced by the Douglas Boston.

Sources:
1. https://en.wikipedia.org/wiki/Martin_Maryland
2. https://en.wikipedia.org/wiki/16_Squadron_SAAF
3. https://en.wikipedia.org/wiki/21_Squadron_SAAF
4. https://en.wikipedia.org/wiki/24_Squadron_SAAF