Flying from this airfield, Quast claimed his first aerial victory on 23 August when he shot down a Lavochkin-Gorbunov-Gudkov LaGG-3 fighter.

[7] The Gruppe then moved to Maykop located in the North Caucasus on 21 September where, with the exception of 24 to 29 October, they were based until 26 November.

Gruppe to move from Maykop to Morozovsk, located approximately 200 kilometers (120 miles) west of Stalingrad, on 26 November.

[10] The Gruppe was moved to the combat area of the Kuban bridgehead on 10 February 1943 where it was initially based at an airfield at Slavyansk-na-Kubani.

[11] While based at Slavyansk-na-Kubani, Quast claimed three aerial victories on 11 February including two Polikarpov I-16 fighters.

The next day, he shot down an Ilyushin Il-2 ground-attack aircraft followed by four fighters claimed destroyed on 13 February.

[14] Flying from Anapa, Quast sank a Soviet motor torpedo boat of the Black Sea Fleet in the area of Gelendzhik on 20 April 1943.

[15] By end-April 1943, credited with 38 aerial victories, Quast had become the fourth highest scoring active fighter pilot of II.

[19] On 7 August, Quast claimed three aerial victories over Yakovlev Yak-1 fighters on an early morning mission in the vicinity southwest of Novorossiysk.

He bailed out approximately 40 km (25 mi) southwest of Novorossiysk over the Black Sea and was taken prisoner of war.

[22] Following World War II, Quast joined the post-war Bundesluftwaffe as a Hauptfeldwebel (master sergeant).