Winter warfare

1. Lead

The cold as an enemy

Winter warfare is war fought in conditions of snow, ice and extreme cold, and it is one of the oldest and most unforgiving forms of warfare. In winter, the enemy is not only the army on the other side of the front: it is the cold itself, which freezes engines, jams weapons, kills the wounded where they lie, and destroys an unprepared army faster than any battle.

A soldier who is cold, wet and hungry cannot march, cannot aim and cannot think, and an army that has not prepared for winter — with warm clothing, with fuel, with food, with shelter — will lose men to frostbite, hypothermia and disease before it ever meets the enemy.

The history of winter warfare is, above all, a history of preparation: the armies that prepared for the cold survived it, and the armies that did not were destroyed by it.

The great winter disasters

Three winter disasters dominate the history of winter warfare, and they are the reason the subject is still studied in military academies today. The first was Napoleon’s retreat from Moscow in 1812, in which the Grande Armée, which had entered Russia with more than 600,000 men, was destroyed by cold, hunger and the Russian winter, losing hundreds of thousands of men.

The second was the Winter War of 1939–40, in which the small Finnish army, fighting on skis in the snow, inflicted terrible losses on the invading Soviet Union. The third was the German invasion of the Soviet Union in 1941 — Operation Barbarossa — in which the German army, which had planned for a short summer campaign, was stopped before Moscow by the Russian winter, and never recovered.

Each of these disasters teaches the same lesson, and it is the lesson of this article: in winter, logistics is strategy, and the cold is the most powerful weapon on the battlefield.

2. Key Facts

Definition	Warfare conducted in snow, ice and extreme cold, where the climate is a decisive factor
Main threats	Frostbite, hypothermia, trench foot, frozen weapons and vehicles, impassable roads, shortened daylight
Classic examples	Napoleon’s retreat from Moscow (1812); the Winter War (1939–40); Operation Barbarossa and Stalingrad (1941–43); the Battle of the Bulge, December 1944
Key equipment	Skis and snowshoes, white camouflage, winter clothing in layers, heated shelters, winter lubricants and antifreeze, tracked vehicles
Key principle	Preparation before winter, not during it; logistics decides winter campaigns

3. Background

Why winter is different

Winter changes war in ways that go far beyond the discomfort of the soldiers. Snow changes the ground: roads disappear, fields become impassable, and rivers freeze solid enough to carry tanks — or break under them. Cold changes the machines: engine oil thickens, batteries fail, gun mechanisms freeze, and aircraft cannot fly in icing conditions.

Darkness changes the day: in the high latitudes of Russia and Scandinavia, the winter day is only a few hours long, and most of the fighting must be done in darkness or in twilight. And cold changes the human body: a soldier who is not warm, dry and fed will lose the ability to fight within hours, and a wounded man left in the snow will die of cold before he dies of his wounds.

Winter warfare is, for these reasons, a separate discipline from summer warfare, with its own equipment, its own tactics and its own logistics, and an army that tries to fight a winter war with summer methods will fail.

The Russian winter in history

No country is more closely associated with winter warfare than Russia, and no phrase is more famous than “General Winter” — the idea that the Russian winter itself is Russia’s greatest general, and that it has defeated invaders whom no army could defeat.

The phrase is a simplification, and historians have rightly pointed out that the Russian winter did not act alone: it was the Russian army, the Russian people, the scorched earth and the vast distances that defeated Napoleon in 1812 and Hitler in 1941, and the winter was one factor among many. But the winter was a real factor, and a decisive one.

In 1812, the temperature fell to minus 20 or minus 30 degrees Celsius, and the Grande Armée, which had no winter clothing and no supply lines, died in the snow on the road from Moscow. In 1941, the German army, which had planned to defeat the Soviet Union before the winter, was caught in the open by the first snows of December, without winter clothing, without antifreeze for its vehicles, and without the fuel to keep its men warm.

The Russian winter did not win those wars by itself, but it punished, mercilessly, the invaders who had not prepared for it.

4. Opposing Forces

The prepared and the unprepared

In winter warfare, the decisive difference between two armies is rarely their numbers or their weapons: it is their preparation. The Finnish army of 1939 was small — about 300,000 men against a Soviet invasion force of about 450,000, with overwhelming superiority in tanks, aircraft and artillery — but it was prepared for winter in a way the Soviet army was not.

The Finns fought on skis, in white camouflage, in small mobile groups that could move through the forests and across the frozen lakes, and they lived in the snow, in tents and in snow shelters, with warm food and dry clothing.

The Soviet troops, by contrast, were road-bound, in dark uniforms that stood out against the snow, in large columns that could not leave the roads, and without winter clothing or skis. The result was one of the most one-sided campaigns in modern history: the Soviet Union, in about three months of fighting, lost an estimated 300,000 or more men killed, wounded and missing, against Finnish losses of about 70,000 in total, and it was forced to accept a negotiated peace that gave it far less than it had demanded.

Winter equipment, side by side

	Prepared army (Finland, 1939)	Unprepared army (Soviet Union, 1939; Germany, 1941)
Movement	Skis, snowshoes, reindeer and horse-drawn sledges; off-road mobility	Road-bound columns; wheeled vehicles stuck in snow; no skis
Camouflage	White overalls and white covers for weapons and vehicles	Dark uniforms and dark vehicles, visible for kilometres against the snow
Clothing	Layered wool clothing, felt boots, warm food cooked in the field	Summer uniforms; thin boots; no winter issue (Germany, 1941)
Shelter	Heated tents, snow shelters, saunas; men kept dry	Open bivouacs; men slept in the snow; frostbite widespread
Weapons	Rifles and machine guns with winter lubricants; the Suomi submachine gun	Weapons jammed by frozen oil; engines would not start; tanks frozen to the ground

The table is a simplification, and it should not be read as a claim that the Finns were supermen or that the Soviets and Germans were fools. The Soviet army learned from the Winter War, and by 1941–42 it was the best winter army in the world, with white camouflage, skis and winter clothing.

The German army, for its part, was not stupid: it had planned a short campaign, and it believed — wrongly — that the war would be over before the winter. The lesson is not that one army was clever and the other was not, but that winter punishes assumptions, and that the assumption most often punished is the assumption that the war will be over before the cold arrives.

5. The Battle

Moscow, 1812: the retreat that destroyed an army

Napoleon entered Russia in June 1812 with the Grande Armée, an army of more than 600,000 men — the largest army Europe had ever seen — and he took Moscow in September, after the Battle of Borodino. But Moscow was empty, and it burned, and Napoleon, with no supplies and no Russian government to negotiate with, was forced to retreat.

The retreat began in October, in autumn rain and mud, and it became a disaster when the winter came early, in November, with temperatures falling to minus 20 and then minus 30 degrees. The army, which had no winter clothing, no food and no fodder for its horses, died on the road: men froze where they stood, horses died by the thousand, and the wagons were abandoned.

At the crossing of the Berezina River, in late November, the remnants of the army fought their way across a frozen river under Russian attack, losing tens of thousands more. Of the more than 600,000 men who had entered Russia, only about 100,000 or fewer returned, and the Grande Armée, as a fighting force, ceased to exist.

Napoleon had not been defeated in a single battle: he had been defeated by distance, by hunger and by the winter.

The Berezina crossing

The crossing of the Berezina, on 26–29 November 1812, was the most terrible episode of the retreat. The army, reduced to a starving mob, had to cross a river that was partly frozen and partly open, under fire from the Russian army, on bridges built by Dutch engineers who worked in the freezing water and died at their task. Tens of thousands of stragglers, who had fallen behind the main body, were left on the far bank when the bridges were burned, and they were killed or captured by the Russians. The word “Berezina” entered the French language as a synonym for disaster, and it remains so today.

The Winter War, 1939–40: skis against tanks

The Winter War began on 30 November 1939, when the Soviet Union invaded Finland, and it lasted until 13 March 1940. The Soviet plan was for a short, easy campaign: the Red Army would break through the Finnish defences on the Karelian Isthmus, take Helsinki within weeks, and install a puppet government.

Instead, the Finns, fighting in the forests and the snow, in temperatures that fell to minus 40 degrees, stopped the invasion. Finnish ski troops, in white camouflage, moved through the forests at night, attacked Soviet columns from the flanks, and cut the roads behind them, creating the “motti” — the encircled pockets of Soviet troops, cut off from supplies, who froze and starved in the snow.

The most famous of these was the Battle of Suomussalmi, in December 1939 and January 1940, where two Finnish regiments, about 11,000 men, destroyed two Soviet divisions, about 45,000 men, in the snow. The Soviet Union eventually won the war, by weight of numbers and by a renewed offensive in February 1940, and Finland was forced to cede territory, but the cost was enormous, and the war exposed the weaknesses of the Red Army to the whole world — including, fatally, to Hitler, who concluded from the Winter War that the Soviet Union was weak and could be defeated in a summer campaign.

Moscow and Stalingrad, 1941–43: the winter that stopped Barbarossa

The German invasion of the Soviet Union, Operation Barbarossa, began on 22 June 1941, and by the autumn the German armies were within sight of Moscow. The German plan was to defeat the Soviet Union before the winter, and no winter clothing had been issued, no antifreeze had been supplied, and no preparations had been made for a winter campaign.

The winter came early, in October, with rain and mud, and then, in November and December, with snow and temperatures falling to minus 30 and, in places, minus 40 degrees. German engines would not start, German guns froze, and German soldiers, in summer uniforms, died of cold in their thousands.

On 5 December 1941, the Soviet Union launched its counter-offensive before Moscow, with fresh Siberian divisions, in white camouflage, on skis, and the German army, which had been on the verge of taking the city, was driven back. The winter of 1941–42 saved Moscow, and the winter of 1942–43, at Stalingrad, destroyed the German Sixth Army, which was encircled in November 1942 and surrendered in February 1943, after a winter in which its men starved and froze in the ruins of the city.

The German army never recovered from the two winters, and the Soviet army, which had learned the lessons of the Winter War, became the master of winter warfare.

6. Turning Point

5 December 1941: the counter-offensive before Moscow

The turning point of winter warfare in the Second World War came on 5 December 1941, when the Soviet Union launched its counter-offensive before Moscow. The date is significant because it was the moment at which the winter, which had been Germany’s enemy, became the Soviet Union’s ally.

The Soviet counter-offensive was not a large operation by the standards of the war — it involved about a million men, and it drove the Germans back about 100 to 200 kilometres — but it proved, for the first time, that the German army could be stopped and driven back, and it proved that the Soviet army could fight, and win, in the winter.

The psychological effect was enormous: the myth of German invincibility, which had survived the campaigns of 1939, 1940 and 1941, was broken, and the war, which Hitler had expected to win in a summer, became a war of attrition that Germany could not win. The winter of 1941–42 was the turning point of the war in the east, and it was a turning point made by the cold.

The lesson learned — and the lesson forgotten

The lesson of December 1941 was learned by the Soviet Union, which made winter warfare a central part of its doctrine, and it was learned, too late, by Germany, which issued winter clothing and winter equipment for the first time in the winter of 1941–42, and which never again planned a campaign on the assumption that the war would be over before the cold.

But the lesson has been forgotten, more than once, since the Second World War. In the Korean War, in the winter of 1950–51, American and United Nations troops, caught in the open by the Chinese offensive in temperatures of minus 30 degrees, suffered terribly from the cold.

In the war in Afghanistan, in the 1980s and again after 2001, the winter in the mountains was a decisive factor in every campaign. And in the war in Ukraine, which began in 2022, the winter has again become a central factor, with both sides fighting in the snow and the mud, and with the cold, as always, punishing the side that is less prepared.

The lesson of winter warfare is a lesson that every generation of soldiers has to learn again.

7. Casualties and Losses

The cold as a killer

The casualties of winter warfare are difficult to count, because the cold kills in ways that are not recorded as battle casualties. A man who dies of hypothermia in his foxhole, a man who loses his feet to frostbite and dies of gangrene in a field hospital, a man who dies of pneumonia after a night in the snow — these deaths are recorded, if they are recorded at all, as deaths from disease or from exposure, not as deaths in battle.

But they are deaths caused by the war, and by the winter, and they number in the hundreds of thousands across the campaigns described in this article. In Napoleon’s retreat from Moscow, the Grande Armée lost, by the most widely accepted estimates, about 400,000 to 500,000 men, of whom only a minority were killed in battle; the rest died of cold, hunger and disease.

In the Winter War, the Soviet Union lost an estimated 300,000 or more men, many of them to the cold. In the winter of 1941–42 before Moscow, the German army lost tens of thousands of men to frostbite alone — the German records list about 100,000 cases of frostbite in the winter of 1941–42, and many of those men never returned to the front.

Frostbite and the wounded

Winter is hardest on the wounded, and the casualty figures for winter campaigns understate the suffering, because a wound that would be survivable in summer is often fatal in winter. A man who is wounded and cannot move will freeze to death in a matter of hours in temperatures of minus 20 degrees, and the stretcher-bearers who might have saved him cannot move through the snow, or cannot find him in the dark.

In the Winter War, Finnish ski troops found Soviet wounded frozen where they had fallen, and in the retreat from Moscow, the French left their wounded in the snow because they could not carry them. The medical services of every army learned, in winter, that the first task was not to treat the wound but to keep the man warm, and that a wounded man who was kept warm had a chance, while a wounded man who was left cold had none.

The figures in this section are estimates, and they should be read as such: the cold does not keep neat records.

8. Map and Geography

The geography of cold

Winter warfare is, above all, a matter of geography, because the cold is not the same everywhere. The winter war is fought in the high latitudes — in Russia, in Finland, in Scandinavia, in the mountains of Korea and Afghanistan — where the winter is long, the snow is deep, and the temperature falls far below freezing.

In these regions, the winter lasts for five or six months, and the campaigning season is the summer: the armies fight in the summer, and they dig in for the winter, or they fight in the winter only if they have prepared for it.

The geography of the Russian winter is the geography of distance and of emptiness: the front in 1941 was more than 2,000 kilometres long, the roads were few and poor, and the distances between the towns were vast. An army that advanced into Russia in the summer, as Napoleon did in 1812 and Hitler did in 1941, advanced into a country that grew larger the further it went, and that, in the winter, became a country in which it could not live.

Frozen rivers and winter roads

In winter, the map changes. Rivers, which in summer are obstacles, freeze and become roads: the great rivers of Russia — the Dnieper, the Don, the Volga — could be crossed on the ice by tanks and by infantry, and the frozen lakes of Finland became highways for the ski troops.

But the frozen rivers were also traps: the ice could break under a tank, and the crossing of the Berezina in 1812, on bridges over a half-frozen river, was a disaster. The winter roads — the roads built on the ice of Lake Ladoga, the “Road of Life” that supplied Leningrad during the siege — were the lifelines of winter warfare, and they were also among its most dangerous places.

The geography of winter warfare is a geography in which the map is redrawn every year by the frost, and in which the army that understands the new map survives, and the army that does not, dies.

9. Outcome and Legacy of Winter warfare

The winter that decided wars

Winter warfare has decided the outcome of wars, and it has done so, in the cases described in this article, by destroying armies that were not prepared for it. Napoleon’s Grande Armée was destroyed by the winter of 1812, and France never recovered its military dominance in Europe. The German army was stopped by the winter of 1941, and it never recovered the initiative in the east.

The Soviet army, which learned winter warfare in the Winter War and in the winter of 1941–42, used it to win the war in the east, and to become, by 1945, the largest and most experienced army in the world.

The legacy of winter warfare is, in this sense, a legacy of preparation: the armies that prepared for the winter won, and the armies that did not lost, and the difference between winning and losing was, in the end, a matter of clothing, of fuel, of food and of shelter — of logistics, not of courage.

Winter warfare today

Winter warfare is still studied, and still practised, today. The armies of the northern countries — Finland, Sweden, Norway, Russia, Canada — maintain winter warfare schools, and their soldiers train every year in the snow. The United States Marine Corps and the United States Army maintain mountain and cold-weather training centres, and the lessons of the Winter War and of Moscow in 1941 are still taught.

The equipment has changed — the skis are plastic, the clothing is synthetic, the vehicles are heated and the weapons are designed for the cold — but the principles have not: prepare before the winter, keep the men warm, dry and fed, and never assume that the war will be over before the cold arrives.

In the war in Ukraine, which began in 2022, the winter has again been a central factor, and the armies that have prepared for it — with winter clothing, with heated shelters, with fuel — have fought through it, while the armies that have not have suffered.

The winter, as always, is the most honest of generals: it does not care about courage, or about ideology, or about the justice of the cause. It cares only about preparation.

10. Commanders

The defenders of the winter

Carl Gustaf Emil Mannerheim (Finland). The Commander-in-Chief of the Finnish armed forces in the Winter War, and the man who organised the Finnish defence. Mannerheim, a former general in the Russian Imperial Army, understood both the Russian army and the Finnish winter, and he built the Finnish defence around the Mannerheim Line on the Karelian Isthmus and the mobile ski troops in the forests. After the war, he became President of Finland. He remains, in Finland, the most revered military figure in the country’s history.

Georgy Zhukov (Soviet Union). The Soviet general who commanded the counter-offensive before Moscow in December 1941, and who went on to command the Soviet armies in the great offensives of 1943, 1944 and 1945, including the taking of Berlin. Zhukov, who had learned winter warfare in the Winter War and in the fighting at Khalkhin Gol in 1939, understood the winter, and he used it. His memoirs, published after the war, give the fullest Soviet account of the winter campaigns.

The victims of the winter

Napoleon Bonaparte (France). The Emperor of France, who led the Grande Armée into Russia in 1812 and who, in the retreat from Moscow, lost the army that had made him the master of Europe. Napoleon was not a fool — he was the greatest general of his age — but he had not prepared for a winter campaign, and he paid for it with his army. The retreat from Moscow was the beginning of the end of the Napoleonic Empire.

Adolf Hitler (Germany). The leader of Germany, who ordered the invasion of the Soviet Union in 1941 and who, against the advice of his generals, insisted that the war would be over before the winter. Hitler’s refusal to prepare for winter — his refusal, in the autumn of 1941, to divert transport from ammunition to winter clothing — was one of the direct causes of the disaster before Moscow. The winter of 1941 was the first of the defeats that would, in the end, destroy the Third Reich.

Simo Häyhä (Finland). A Finnish sniper, known as the “White Death”, who fought in the Winter War and who is credited with more than 500 kills, the highest number recorded for any sniper in a major war. Häyhä fought in white camouflage, on skis, in temperatures of minus 20 to minus 40 degrees, and he used an iron-sighted rifle, without a telescopic sight, so that his position would not be given away by the glint of glass.

He was wounded in the face in March 1940, near the end of the war, and he survived. His record should be treated with care — the figure of 500 is an estimate, and the number of confirmed kills is lower — but his story has become, in Finland and around the world, the symbol of the winter soldier.

Frequently Asked Questions

What is winter warfare?
Warfare fought in snow, ice and extreme cold, where the climate is a decisive factor and where preparation — clothing, fuel, food and shelter — matters more than numbers or weapons.

What is “General Winter”?
A phrase for the idea that the Russian winter itself defeats invaders. It is a simplification: the winter was one factor, alongside the Russian army, the distances and the scorched earth, but it was a real and decisive factor in 1812 and in 1941.

How did Finland resist the Soviet Union in the Winter War?
By fighting on skis, in white camouflage, in small mobile groups in the forests, and by cutting Soviet road-bound columns into encircled pockets — the “motti” — that froze and starved in the snow.

Why did the German army fail before Moscow in 1941?
Because it had planned for a short summer campaign and had not prepared for winter: no winter clothing, no antifreeze, and no fuel for heating. The winter came early, and on 5 December 1941 the Soviet Union counter-attacked and drove the Germans back.

What is a “motti”?
A Finnish term for an encircled pocket of enemy troops, cut off from supplies and left to freeze and starve. The word originally meant a pile of logs, and it was used in the Winter War for the pockets of Soviet troops cut off on the forest roads.

Is winter warfare still relevant today?
Yes. The armies of the northern countries still train for winter warfare every year, and the winter has been a central factor in the war in Ukraine since 2022, as it was in Korea and in Afghanistan.

Related articles

• Counterattack
• Flanking manoeuvre
• River crossing

Sources

1. Wikipedia, “Winter warfare” — the definition, the equipment, and the classic campaigns.
2. Wikipedia, “Winter War” — the Finnish defence, the motti tactic, and the casualty figures.
3. Wikipedia, “French invasion of Russia” — Napoleon’s retreat from Moscow in 1812 and the Berezina crossing.
4. David M. Glantz and Jonathan M. House, When Titans Clashed: How the Red Army Stopped Hitler (University Press of Kansas, 1995) — the winter of 1941–42 and the Soviet counter-offensive before Moscow.
5. William R. Trotter, A Frozen Hell: The Russo-Finnish Winter War of 1939–1940 (Algonquin Books, 1991).
6. Encyclopædia Britannica, “Winter War” and “Napoleonic Wars” — summaries of the campaigns.

Further reading

• Allen F. Chew, The White Death: The Epic of the Soviet-Finnish Winter War (Michigan State University Press, 1971).
• David M. Glantz, Barbarossa: Hitler’s Invasion of Russia 1941 (Tempus, 2001) — the German advance and the winter before Moscow.