Терек
On 1 November 1942, Hrabak left JG 54 and took over command of "Jagdgeschwader" 52 (JG 52—52nd Fighter Wing) as "Geschwaderkommodore" (wing commander). At the time, JG 52 was based at Prokhladny and Gonschtakowka and operated over the front at the Terek River in the Northern Caucasus. Under Hrabak's leadership, JG 52 claimed its 10,000th aerial victory on 2 September 1944.