The unit participated in large battles in summer 1944, during the Finnish-Soviet Continuation War.

When the Soviet Red Army launched its fourth strategic offensive on 9 June 1944 C. G. E. Mannerheim asked Nazi Germany for help.

[1] The detachment consisted of some 70 airworthy aircraft to support the 200 strong Finnish force,[2] but its operational strength varied due to losses, additions and troop movements.

According to this, II./SG 3 was training at Jēkabpils, I./SG 5 in Pori, and III and IV./JG 54 in Illesheim, and they could not participate in the fighting on the Karelian Isthmus.

The majority of the aircraft of the unit left Finland on 23 July, but I/SG 5 who stayed until 13 August.