13. Staffel (slowakisches) Jagdgeschwader 52 (13.(slovak)/ JG 52) was a front-line German unit of the Luftwaffe made up of Slovak personnel during World War II. They operated on the Eastern Front using Messerschmitt Bf 109s (E,F and G), between 1941 and 1943. 13 staffel flew some 2000 sorties and claimed around 216 kills for the loss of only four pilots killed (and three who defected to the Soviets). The leading ace was Ján Reznák with 32 confirmed victories and Izidor Kovárik with 28 confirmed victories.