 Flight testing of the prototype revealed it to be able to outfight several significant combat aircraft of the time, including even the more modern Macchi C 200 and the German Messerschmitt Bf 109E fighters.During the run up to and following the outbreak of the Second World War, the aircraft was ordered by several nations, including the Hungarian, Swedish, British and Italian governments.Upon entering squadron service, the Re 2000 soon proved to be a technically advanced aircraft, being well balanced and extremely aerodynamic during flight, but was not without its faults.