Joseph Stalin
1941–1942: German invasion

In June 1941, Germany invaded the Soviet Union, initiating the war on the Eastern Front. Despite intelligence agencies repeatedly warning him of Germany's intentions, Stalin was taken by surprise. He formed a State Defense Committee, which he headed as Supreme Commander, as well as a military Supreme Command (Stavka), with Georgy Zhukov as its Chief of Staff. The German tactic of blitzkrieg was initially highly effective; the Soviet air force in the western borderlands was destroyed within two days. The German Wehrmacht pushed deep into Soviet territory; soon, Ukraine, Byelorussia, and the Baltic states were under German occupation, and Leningrad was under siege; and Soviet refugees were flooding into Moscow and surrounding cities. By July, Germany's Luftwaffe was bombing Moscow, and by October the Wehrmacht was amassing for a full assault on the capital. Plans were made for the Soviet government to evacuate to Kuibyshev, although Stalin decided to remain in Moscow, believing his flight would damage troop morale. The German advance on Moscow was halted after two months of battle in increasingly harsh weather conditions.

Going against the advice of Zhukov and other generals, Stalin emphasised attack over defence. In June 1941, he ordered a scorched earth policy of destroying infrastructure and food supplies before the Germans could seize them, also commanding the NKVD to kill around 100,000 political prisoners in areas the Wehrmacht approached. He purged the military command; several high-ranking figures were demoted or reassigned and others were arrested and executed. With Order No. 270, Stalin commanded soldiers risking capture to fight to the death describing the captured as traitors; among those taken as a prisoner of war by the Germans was Stalin's son Yakov, who died in their custody. Stalin issued Order No. 227 in July 1942, which directed that those retreating unauthorised would be placed in "penal battalions" used as cannon fodder on the front lines. Amid the fighting, both the German and Soviet armies disregarded the law of war set forth in the Geneva Conventions; the Soviets heavily publicised Nazi massacres of communists, Jews, and Romani. Stalin exploited Nazi anti-Semitism, and in April 1942 he sponsored the Jewish Anti-Fascist Committee (JAC) to garner global Jewish support for the Soviet war effort.

The Soviets allied with the United Kingdom and United States; although the U.S. joined the war against Germany in 1941, little direct American assistance reached the Soviets until late 1942. Responding to the invasion, the Soviets intensified their industrial enterprises in central Russia, focusing almost entirely on production for the military. They achieved high levels of industrial productivity, outstripping that of Germany. During the war, Stalin was more tolerant of the Russian Orthodox Church, allowing it to resume some of its activities and meeting with Patriarch Sergius in September 1943. He also permitted a wider range of cultural expression, notably permitting formerly suppressed writers and artists like Anna Akhmatova and Dmitri Shostakovich to disperse their work more widely. The Internationale was dropped as the country's national anthem, to be replaced with a more patriotic song. The government increasingly promoted Pan-Slavist sentiment, while encouraging increased criticism of cosmopolitanism, particularly the idea of "rootless cosmopolitanism", an approach with particular repercussions for Soviet Jews. Comintern was dissolved in 1943, and Stalin encouraged foreign Marxist–Leninist parties to emphasise nationalism over internationalism to broaden their domestic appeal.

In April 1942, Stalin overrode Stavka by ordering the Soviets' first serious counter-attack, an attempt to seize German-held Kharkov in eastern Ukraine. This attack proved unsuccessful. That year, Hitler shifted his primary goal from an overall victory on the Eastern Front to the goal of securing the oil fields in the southern Soviet Union crucial to a long-term German war effort. While Red Army generals saw evidence that Hitler would shift efforts south, Stalin considered this to be a flanking move in a renewed effort to take Moscow. In June 1942, the German Army began a major offensive in Southern Russia, threatening Stalingrad; Stalin ordered the Red Army to hold the city at all costs. This resulted in the protracted Battle of Stalingrad. In December 1942, he placed Konstantin Rokossovski in charge of holding the city. In February 1943, the German troops attacking Stalingrad surrendered. The Soviet victory there marked a major turning point in the war; in commemoration, Stalin declared himself Marshal of the Soviet Union.
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