With the threat of war looming over Europe in 1939, Sweden sought to buy fighter aircraft and found Italy willing to deliver the Reggiane 2000, designated J20 by the Swedish Air Force. All 60 operated from Bulltofta near Malmö, to strengthen air defence over South Sweden and often escorted foreign aircraft seeking refuge in Sweden during WW II. Serial 2340 was delivered in August 1942 and withdrawn from use when the war ended, in 1945. Of the two surviving Re2000s in the world, this is the only one that is complete.

The aft fuselage of Reggiane 2000-I Falco (or J20 in Swedish air force parlour) is kept inisde Ängelholms Flygmuseum. The Swedish purchases of Italian warplanes from 1939 were an emergency measure, as no other countries were willing to supply aircraft to Sweden, which production did not become sufficient until 1943. The Swedish Air Force purchased 60 Re2000 Serie Is, which received the Swedish designation J20 and were delivered 1941-1943. All served with F10 from Bulltofta near Malmö.

The Re.2000 was one of two Italian aircraft types bought by the Flygvapnet when WWII broke out. It was given the designation J 20 and assigned to F 10 based at Bulltofta in Malmö. There, one of the aircraft's duties was to pilot foreign aircraft to suitable airfields, when they needed to make an emergency landing in Sweden during WWII. This J 20 arrived by rail from Italy in 1942 and, after the war was over, was used for ground instructional training so many panels were removed. The aircraft was later transferred to the museum at Malmen and is the only complete example of the type extant.

This "Falco" ( Italian for hawk) had sunk in the waters of Portovenere (La Spezia) on April 16th, 1943. It was discovered in April 2012. The recovering operation was carried out for free by the company Micoperi (the same company which has completed he straightening of the cruise ship Costa Concordia). The Falco was about twenty feet deep and it crashed off the Liguria coast during a training mission. The wreck can now be seen inside the museum.

A very rare Reggiane fighter. The Re.2000 mainly served with the Hungarian and Swedish air forces, with the Regia Aeronautica preferring the Macchi MC.200.