The summer of 1942 saw Army Group South subdivided into Army Group A and B. Army Group A, which included Kleist's 1st Panzer Army, had the task of leading the Axis thrust into the Caucasus in the execution of Case Blue, the German offensive which aimed to capture the important oilfields of Grozny and Baku. The 1st Panzer Army was to spearhead the attack. Army Group A advanced deep into Southern Russia, capturing Rostov, Maykop, Krasnodar and the Kuban region. However, heavy Soviet resistance and the long distances from Axis sources of supply eventually reduced the Axis offensive to local advances only and prevented the Army Group A from capturing their ultimate objectives.