Political map of Europe & the Mediterranean 16 September 1942 (Case Blue): With the German bid to capture Moscow thwarted (Battle of Moscow), Hitler (Adolf Hitler) turned his attention to the southeast. In the 1942 Summer Offensive (Case Blue), he attempted to seize the oil fields of southern Russia and the Caucasus. However after dramatic initial successes, the attack ground to a halt, both in the Caucasus foothills and at the strategic city of Stalingrad (Battle of Stalingrad).