In March, the pro-German Yugoslav government was toppled. A furious Hitler ordered the attack on Greece to be expanded to include Kingdom of Yugoslavia. Operation Marita. The Luftwaffe committed StG 1, 2 and 77 to the campaign. StG 1 was reassigned to VIII Fliegerkorps, under the command of von Richthofen, for the Greek campaign. I./StG 1 moved to Kraynitsi on 1 April, south west of Sofia, Bulgaria. It reported 24 Ju 87Rs available plus the attachment on Stab./StG 2, assigned for the duration of the invasions of Yugoslavia and Greece. III./StG 1 transferred to Argos, Greece to support the attack on Crete on 23 May and did not participate in the campaign on the mainland.