The National Republican Air Force (Aeronautica Nazionale Repubblicana, or ANR) was the air force of the Italian Social Republic during World War II, closely linked with the German Air Force (Luftwaffe) in northern Italy.
This air force was tasked with defending the industrial areas of the region, intercepting Allied bombers en route to southern Germany and the allied and occupied territories of the Axis, and giving close support to German and Italian land forces. Later during the war various units served with German forces based at Spilve, near Riga (Reichskommissariat Ostland), on the northern Russian Front, amongst others in the central and south area (Crimea) on the front.
The ANR, after the 1943 armistice that divided Italy, received numbers of Italian aircraft, later augmented with their own local production, and further aircraft from Germany. This force was opposed to the Italian Co-Belligerent Air Force (Aviazione Cobelligerante Italiana, or ACI, or Aeronautica Cobelligerante del Sud), the Italian pro-Allied air force, though they never actually met in combat.
Combat operations began in December 1943, leading, in the following January, to the attack performed by the 1st Squadriglia "Asso di Bastoni", against a formation of US P-38 Lightnings, three of which were shot down. Starting from June 1944, ANR started to receive Messerschmitt Bf 109G-6s for its fighter force. From October 1944 to February 1945, when the 1st Fighter Group "Asso di Bastoni" returned from training in Germany, 2nd Fighter Group "Gigi Tre Osei" was the only ANR fighter unit active in the defence of the northern Italian territory. From mid-1944, the casualty ratio started to outbalance the victories of the Italian pilots. The last interception missions were carried on 19 April 1945.