The Warning Hitler Refused to Hear
In early 1941, General Friedrich Paulus — the same officer who would later surrender an entire German army at Stalingrad — ran a series of war games simulating a Soviet invasion. The results were alarming. The studies revealed that Germany's supply lines could not sustain a deep offensive into Soviet territory. Fuel, food, and ammunition would run out long before the enemy did.
Paulus was not alone in his doubts. Field Marshal Gerd von Rundstedt and other senior commanders expressed serious reservations about the plan's ambitions. Hitler dismissed the concerns. In his mind, the Soviet Union was, as he reportedly described it, "a rotten structure" that would collapse after a single hard kick. He had watched France fall in six weeks. He expected the same.
He was catastrophically wrong.
The Largest Invasion in Human History
At 3:15 in the morning on June 22, 1941, over three million German and Axis soldiers crossed into Soviet territory along a front stretching nearly 3,000 kilometres — from the Baltic Sea in the north to the Black Sea in the south. They were supported by around 3,500 tanks, 7,000 artillery pieces, and 2,500 aircraft. No military operation before or since has matched its scale.
The invasion was named Operation Barbarossa, after Frederick Barbarossa, the medieval Holy Roman Emperor known for his military campaigns. The name was chosen deliberately — a symbol of Germanic conquest and expansion eastward, a concept the Nazis called Lebensraum, or "living space."
In the opening weeks, the results seemed to confirm Hitler's confidence. German forces advanced hundreds of kilometres, encircling entire Soviet armies. Hundreds of thousands of prisoners were taken. Stalin, caught off guard despite multiple intelligence warnings — including from the British, who had decoded German communications — reportedly suffered a psychological breakdown in the first days of the invasion.
Why It Was Always Going to Fail
The early victories hid a fundamental problem: Germany had not prepared for a long war. Wehrmacht soldiers marched into the Soviet Union in summer uniforms. There were not enough winter coats, not enough cold-weather lubricants for weapons and engines, and not enough transport vehicles to keep supplies moving across the vast Soviet road network — which was barely a network at all. Soviet roads were largely unpaved, and heavy rains turned them into rivers of mud in autumn, a season the Germans grimly called Rasputitsa, or "the time without roads."
Hitler had also made a critical strategic error mid-campaign. In August 1941, with his forces driving toward Moscow, he redirected a significant portion of Army Group Centre southward to capture Ukraine and its resources. Many historians argue this delay cost Germany its best chance to take Moscow before winter arrived. By the time the renewed push toward Moscow began in October, the Soviet capital had been heavily reinforced.
The winter of 1941–42 was one of the coldest in decades. Temperatures dropped to minus 40 degrees Celsius. German soldiers stuffed newspapers inside their uniforms for warmth. Frostbite hospitalised more men than combat wounds. Tank engines had to be lit with open flames to start. Meanwhile, Soviet troops, equipped with winter gear and fighting on home soil, launched a massive counteroffensive in December that pushed the Germans back from Moscow's outskirts.
What This Day Actually Decided
Operation Barbarossa did not immediately end the war — the fighting on the Eastern Front would continue until May 1945 and would consume approximately 27 million Soviet lives, more than any other nation lost in any conflict in recorded history. But June 22, 1941, was the moment Germany's strategic position became, in hindsight, unwinnable.
By invading the Soviet Union while still at war with Britain, Hitler created the two-front war that had haunted German military planners since the 19th century. When the United States entered the conflict in December 1941, the arithmetic became impossible.
The general's warning had been right. The supply lines were impossibly long. The winter was brutal. And the Soviet people, whatever they thought of Stalin, fought for their homeland with a ferocity that shattered every German assumption.
History rarely turns on a single moment. But some decisions close off every other possible future. This was one of them.
