 Complete the following phrase:  I Gruppe had 30 He 111H-6s ready for action on 1 July. Ostrogoshsk was attacked on 4 July and it moved from Kharkov to Barvenovka on 8 July. The group began attacks on Stalingrad on 16 August, well before German spearheads reached the city. II.KG 55 mustered 33 bombers for the offensive. Bombing operations over Starobelsk on 10 July was followed by a move to Kramatorskaya on 14 July. Luganskoye was bombed on 14 July and then it targeted Soviet oil tankers and other transports moving along the Volga river. It was then transferred to the Crimea and attacked Novorossisk 10 August and bombed rail lines around Tupase 18 August. It returned to Morosovskaya. III Gruppe was attacking targets around Bulazelovka 10 June, Grakovo 12 June and destroyed a bridge at Kupyansk on 22 June. Svoboda rail station was bombed on 25 and 27 June. It reported to still have 30 He 111s on 1 July. It moved eastward from Kharkov to Kramatorskaya on 14 July. It detached 9 staffel to operate from Kerch over the Black Sea. 7 and 8 Staffel raided traffic on the Volga on 31 July. From 24 to 31 July 1942 it flew an average of 23 sorties per day and dropped 29 tons of bombs. The group moved to Samorsk in the eastern Crimea altogether on 5 August and began support for German forces in 