The Hungarian Second Army was one of three field armies raised by the Kingdom of Hungary which saw action during World War II. All three armies were formed on March 1, 1940. The Second Army was the best-equipped Hungarian formation at the beginning of the war, but was virtually eliminated as an effective fighting unit by overwhelming Soviet force during the Battle of Stalingrad, suffering 84% casualties. Towards the end of the war, a reformed Second Army fought more successfully at the Battle of Debrecen, but, during the ensuing Siege of Budapest, it was destroyed completely and absorbed into the Hungarian Third Army.

The Battle of Stalingrad occurred on the Eastern Front of World War II, beginning when Nazi Germany and its Axis allies attacked and became locked in a protracted struggle with the Soviet Union for control over the Soviet city of Stalingrad in what is now southern Russia. The battle was characterized by fierce close-quarters combat and direct assaults on civilians in aerial raids; the battle epitomized urban warfare and is recorded as the single largest and costliest urban battle in military history. It was the bloodiest and fiercest battle of the entirety of World War II—and arguably in all of human history—as both sides suffered tremendous casualties amidst ferocious fighting in and around the city. Today, the Battle of Stalingrad is commonly regarded as the turning point in the European theatre of World War II, as Germany's Oberkommando der Wehrmacht was forced to withdraw a considerable amount of military forces from other regions to replace losses on the Eastern Front. By the time the hostilities ended, the German 6th Army and 4th Panzer Army had been destroyed and Army Group B was routed. The Soviets' victory at Stalingrad shifted the Eastern Front's balance of power in their favour, while also boosting the morale of the Red Army.