 Complete the following phrase:  The first seven Re.2000 were sent to the Eastern Front on an experimental basis during autumn 1941. Flying alongside the Fiat CR.32s of 13 Fighter Company, the Reggiane pilots claimed eight kills, for one loss, during three months of combat, against Soviet Air Force. In the summer of 1942, Hungarian Air Force contributed with its 1st Repülőcsoport aviation detachment to the German offensive 