The main objective of the German operation "Case Blue" during World War II was originally to capture what?

The story behind the answer

Caucasus is correct because Operation Case Blue (Fall Blau), launched in summer 1942, aimed primarily to seize the Soviet Union’s vital oil fields in the Caucasus—Maikop, Grozny, and ultimately Baku. Germany’s war machine was starved of fuel, and Hitler believed capturing these resources would cripple the Red Army and sustain the Wehrmacht. Stalingrad, though famous, was initially a supporting objective to secure the Volga flank and cut Soviet transport, not the main goal.

Context: Army Group South split—Group A drove into the Caucasus for oil, while Group B moved toward the Volga and Stalingrad. Soviet sabotage denied the Germans usable oil at Maikop, and the pivot to Stalingrad led to catastrophic losses. Memory tip: “Blue needs fuel”—Case Blue chased the blue flame of oil in the Caucasus.