Never-were users of Grumman G-36 (F4F) Wildcat/Martlet by Naixoterk.
France ordered 81 or 100 in late 1939 (100 is number of G-36A's eventually built, but it's unclear if it includes also aircraft build for Belgium) for their aircraft carriers (Bearn as well as Joffre and Plainleve under construction), but after fall of France the delivery was diverted to Great Britain where the planes were introduced into service as Martlet Mk.I.
Belgium is bit mysterious "user-to-be", since only some sources mention that country's interest in G-36A at all, and it's unclear how many planes were ordered (these sources that mention it, claim that "at least 10").
Greece was to receive 30 F4F-3A (with non-folding wings) aircraft after Italian invasion, but the delivery was only at sea when Greece was overrun in April-May 1941 so the aircraft were turned to North Africa, where they were introduced to No.805 Squadron FAA stationed in Egypt as Martlet Mk.III
USA (Belgium, France, Greece), Grumman G-36 F4F Wildcat Martlet