(A) Battle of Leningrad
(B) Battle of Moscow
(C) ** Battle of Stalingrad
(D) Battle of Berlin
EXPLANATIONS BELOW
Concept note-1: -The Battle of Stalingrad (23 August 1942 – 2 February 1943) was a major battle on the Eastern Front of World War II where Nazi Germany and its allies unsuccessfully fought the Soviet Union for control of the city of Stalingrad (later renamed Volgograd) in Southern Russia.
Concept note-2: -The turning point of the Battle of Stalingrad was a Soviet counteroffensive named Operation Uranus. It targeted the weak Axis forces defending the flanks of the German armies trying to take the city.
Concept note-3: -Operation Barbarossa (German: Unternehmen Barbarossa; Russian: , romanized: Operatsiya Barbarossa) was the invasion of the Soviet Union by Nazi Germany and many of its Axis allies, starting on Sunday, 22 June 1941, during the Second World War.
Concept note-4: -The battle for Stalingrad would rage on for 163 days, from August 1942 to February 1943, before the German Sixth Army, encircled and besieged, was forced to surrender. It was the turning point of the war on the critical Eastern front of World War II in Europe.
Concept note-5: -Stalingrad was one of the most decisive battles on the Eastern Front in the Second World War. The Soviet Union inflicted a catastrophic defeat on the German Army in and around this strategically important city on the Volga river, which bore the name of the Soviet dictator, Josef Stalin.