World History Timeline

Second World War Timeline: Road to War → Blitzkrieg → Global War → Turning the Tide → Victory → Aftermath

Barely twenty years after the First World War, the world went to war again — and this time the fighting reached almost every continent and ocean. From 1939 to 1945, armies, navies, and air forces clashed from the Arctic to the Pacific, cities were bombed, and millions of civilians were murdered or starved. India sent about 2.5 million soldiers, and the war’s end helped bring independence in 1947 and a new world order built around the United Nations.

This timeline covers the Great Depression, the rise of dictators, Munich, the invasion of Poland, Dunkirk, the Battle of Britain, the Blitz, Keren, Operation Barbarossa, Pearl Harbor, the fall of Singapore, Midway, Quit India, El Alamein, Stalingrad, the Holocaust, the Bengal famine, Monte Cassino, Imphal and Kohima, D-Day, VE Day, Hiroshima and Nagasaki, Japan’s surrender, the United Nations, Nuremberg, and Indian independence.

1 Sept 1939 Poland invaded → 3 Sept 1939 India declared at war 7 Dec 1941 Pearl Harbor → 6 June 1944 D-Day 8 May 1945 VE Day → 2 Sept 1945 Japan surrenders

Why the Second World War Matters

The Second World War was the deadliest conflict in human history, killing an estimated 70 to 85 million people — most of them civilians. It included the Holocaust, the first and only use of atomic weapons in war, and battles on a scale never seen before. Its end created the United Nations, divided Europe in the Cold War, and weakened the old empires so much that India and dozens of other nations won their independence within a few decades.

Big picture

The Second World War in one view

The Depression and the rise of dictators led to war in 1939, Germany conquered much of Europe by 1940, the war became global in 1941 when Germany invaded the Soviet Union and Japan attacked Pearl Harbor, the tide turned at Midway, El Alamein, and Stalingrad, the Allies closed in from every side in 1944–1945, and the peace brought the United Nations, the Cold War, and independence for India. Related timelines: computers, pharma industry, news.

6 years

From 1 September 1939 to 2 September 1945

70–85 million

Deaths worldwide, soldiers and civilians (estimate)

~2.5 million

Indian Army at its peak, all volunteers

51

Founding members of the United Nations, including India

Split image with Allied soldiers wading ashore from landing craft past steel beach obstacles under smoke and a grey sky in June 1944 on the left, and the same wide sandy beach today on the right with families walking, beach umbrellas, green bluffs, and a stone memorial under a blue sky
A Normandy beach on D-Day in 1944 and the same shore as a peaceful holiday beach today (artistic illustration).

War and the World Then vs Now

🧭 Road to War1919 – 1939

Road to War

The peace of 1919 left many Germans bitter, and the Great Depression after 1929 brought mass unemployment and despair. Dictators promising national glory took power in Italy and Germany, and military leaders gained control of Japan’s government. Each tested the world with acts of aggression, while Britain and France, hoping to avoid another war, followed a policy of appeasement.

Sepia scene of a long queue of unemployed men in flat caps, fedoras, and worn overcoats waiting along a brick wall on a cold city street in the early 1930s, with a horse-drawn cart and an old car in the misty background
Unemployed men queue for food during the Great Depression of the early 1930s (artistic illustration).
  • 1919–1929: The Treaty of Versailles punishes Germany (1919), Benito Mussolini’s Fascists take power in Italy after the March on Rome (1922), and the Wall Street Crash (October 1929) starts the Great Depression.
  • 1931–1935: Japan seizes Manchuria (1931), Adolf Hitler becomes chancellor of Germany (30 January 1933) and builds a Nazi dictatorship, and Italy invades Ethiopia (1935) as the League of Nations fails to act.
  • 1936–1938: Germany marches into the Rhineland (1936), the Spanish Civil War begins (1936), Japan launches full-scale war on China (July 1937), and Germany annexes Austria (March 1938).
  • September 1938–August 1939: The Munich Agreement hands part of Czechoslovakia to Germany (September 1938), Germany occupies the rest (March 1939), and the Nazi–Soviet Pact (23 August 1939) clears the way to invade Poland.

Technology

  • Radar: Britain builds a coastal warning chain.
  • Monoplane fighters: Faster all-metal aircraft.
  • Radio propaganda: Broadcasts reach every home.

Features

  • Depression: Mass unemployment.
  • Dictators: Fascism and Nazism.
  • Appeasement: Giving in to avoid war.
⚡ Blitzkrieg1939 – 1940

Blitzkrieg & Britain Alone

Germany’s “lightning war” combined tanks, aircraft, and fast-moving infantry. Poland fell in weeks, and in the spring of 1940 Germany overran Denmark, Norway, the Low Countries, and France. Britain and its empire fought on alone, rescuing their army at Dunkirk and winning the Battle of Britain in the air. In India, the Viceroy’s declaration of war without consulting Indian leaders caused a political crisis.

Long lines of soldiers in steel helmets wading out from a sandy beach with grassy dunes towards small fishing boats, sailing craft, and a grey warship offshore, while thick black smoke rises from burning oil tanks on the horizon under a stormy sky
Soldiers wade out to small boats during the evacuation from Dunkirk in 1940 (artistic illustration).
  • 1–17 September 1939: Germany invades Poland (1 September), Britain and France declare war (3 September), the Viceroy declares India at war the same day, and the Soviet Union invades eastern Poland (17 September).
  • October 1939–April 1940: Congress ministries in the provinces resign in protest (October–November 1939), the quiet “Phoney War” settles on the Western Front, and Germany invades Denmark and Norway (April 1940).
  • May–June 1940: Germany attacks the Netherlands, Belgium, and France (10 May), Winston Churchill becomes British prime minister, about 338,000 troops are evacuated from Dunkirk, Italy joins Germany, and France signs an armistice (22 June).
  • July 1940–May 1941: The Royal Air Force wins the Battle of Britain (July–October), German bombers strike British cities in the Blitz, and Germany, Italy, and Japan sign the Tripartite Pact (27 September 1940).

Technology

  • Tanks and dive-bombers: Fast, combined attacks.
  • Radar network: Early warning of raids.
  • Cipher machines: Coded radio orders.

Features

  • Lightning war: Rapid German conquests.
  • Dunkirk: An army rescued by sea.
  • Battle of Britain: Invasion called off.
🌏 Global War1941 – 1942

A Global War

In 1941 the war spread across the world. Germany invaded the Soviet Union in the largest land attack in history, and Japan’s surprise attacks on Pearl Harbor and European colonies in Asia brought the United States into the war. Japan swept through Southeast Asia to the borders of India, and in August 1942 the Quit India Movement demanded an immediate end to British rule.

Wooden flight deck of a 1940s aircraft carrier crowded with dark blue propeller-driven navy aircraft with folded wings, deck crew in coloured jerseys, the ship’s island superstructure on the right, and an escort warship on a deep blue ocean under white tropical clouds
Navy aircraft ready on a carrier deck, as at the Battle of Midway in 1942 (artistic illustration).
  • February–June 1941: Indian divisions help win the Battle of Keren in East Africa (February–March), the United States begins Lend-Lease aid to Britain (March), and Germany invades the Soviet Union on 22 June.
  • September–December 1941: The siege of Leningrad begins (September), the Soviet army stops the Germans before Moscow (December), and Japan attacks Pearl Harbor and Malaya (7–8 December), bringing the United States into the war.
  • February–April 1942: Singapore surrenders (15 February) and tens of thousands of Indian soldiers become prisoners, Japan conquers Burma as refugees trek to India, and the Cripps Mission fails to win Indian support (March–April).
  • June–August 1942: The US Navy sinks four Japanese carriers at Midway (4–7 June), and the Congress launches the Quit India Movement in Bombay (8 August), after which Gandhi and other leaders are arrested.

Technology

  • Aircraft carriers: Air power at sea.
  • Sonar: Hunting submarines.
  • Codebreaking: Reading enemy signals.

Features

  • Eastern Front: Germany against the Soviet Union.
  • Pacific War: Japan against the Allies.
  • Quit India: “Do or die”.
🔄 Turning the Tide1942 – 1943

Turning the Tide

Between late 1942 and 1943 the Axis advance was stopped on every front. The Allies won in North Africa, the Soviet army destroyed a German army at Stalingrad, and Italy surrendered. Behind the lines, Nazi Germany carried out the Holocaust. In India, the Bengal famine killed millions, and Subhas Chandra Bose led the Indian National Army with Japanese support.

Ruined industrial city in winter beside a wide river, with shattered factory and apartment buildings, snow-covered rubble, plumes of black smoke, and four soldiers in long greatcoats and fur hats carrying rifles as they pick their way through the ruins
Soviet soldiers move through the snowy ruins of Stalingrad on the Volga (artistic illustration).
  • 1941–1945: Mass shootings begin in the occupied Soviet Union in 1941, and after the Wannsee Conference (20 January 1942) coordinates the “Final Solution”, Nazi Germany murders about six million Jews in the Holocaust, along with Roma, disabled people, and others, in ghettos, mass shootings, and death camps.
  • October 1942–February 1943: British, Commonwealth, and Indian troops win the Second Battle of El Alamein (October–November), Allied forces land in North Africa (8 November), and the German Sixth Army surrenders at Stalingrad (2 February 1943).
  • May–September 1943: Axis forces in North Africa surrender (May), the Soviets win the huge tank battle of Kursk (July–August), the Allies invade Sicily (July), and Italy surrenders (8 September).
  • 1943: The Bengal famine kills an estimated 2 to 3 million people, Subhas Chandra Bose proclaims the Provisional Government of Free India in Singapore (21 October), and Allied leaders meet at Tehran (November).

Technology

  • Long-range patrol aircraft: Closing the Atlantic gap.
  • Centimetric radar: Spotting U-boats.
  • Penicillin: Mass production begins.

Features

  • Stalingrad: Turning point in the east.
  • Holocaust: Genocide of Europe’s Jews.
  • Bengal famine: Disaster in India.
🏁 Victory1944 – 1945

Road to Victory

In 1944 the Allies closed in from every side. Indian and British troops defeated the Japanese invasion of India at Imphal and Kohima, the Allies landed in Normandy, and the Soviet army drove west towards Berlin. Germany surrendered in May 1945, and after atomic bombs destroyed Hiroshima and Nagasaki and the Soviet Union entered the Pacific war, Japan surrendered in August.

Reconstructed landing on a beach with soldiers in helmets wading ashore from landing craft with lowered ramps, steel beach obstacles in the surf, warships on the horizon, barrage balloons in a grey sky, and steep cliffs to the right
Allied troops wade ashore on the beaches of Normandy on D-Day (artistic illustration).
  • January–July 1944: Indian divisions fight at Monte Cassino in Italy (January–May), the Japanese invasion of India is defeated at Imphal and Kohima (March–July), and the Allies land in Normandy on D-Day (6 June).
  • August 1944–January 1945: Paris is liberated (25 August), Germany’s last great attack fails in the Battle of the Bulge (December–January), and Soviet troops liberate Auschwitz (27 January 1945).
  • February–May 1945: Allied leaders meet at Yalta (February), Hitler dies by suicide in Berlin (30 April), Indian and British troops retake Rangoon (May), and Germany surrenders unconditionally — VE Day, 8 May.
  • August–September 1945: The United States drops atomic bombs on Hiroshima (6 August) and Nagasaki (9 August), the Soviet Union declares war on Japan (8 August), and Japan surrenders (15 August), signing on 2 September.

Technology

  • Jet aircraft: First jet fighters in combat.
  • V-2 rockets: First long-range ballistic missiles.
  • Atomic bomb: Nuclear weapons first used.

Features

  • Second front: D-Day landings.
  • India defended: Imphal and Kohima.
  • Surrender: VE Day and VJ Day.
🕊️ Aftermath1945 – Today

Aftermath & Remembrance

The victors set up the United Nations to keep the peace and put Nazi and Japanese leaders on trial for war crimes. Europe was divided between the Western powers and the Soviet Union in the Cold War. Exhausted by war, Britain could no longer hold India, which won independence in 1947, and a wave of decolonisation followed across Asia and Africa.

Delegate in a dark suit signing a large bound document at a table on a stage in an ornate assembly hall, with a row of flags of many nations behind him, rows of seated delegates, and press photographers with flash cameras
A delegate signs a founding charter as nations gather to build a lasting peace in 1945 (artistic illustration).
  • 1945–1946: Fifty nations, including India, sign the United Nations Charter in San Francisco (26 June 1945), the Nuremberg trials begin (November 1945), and the trials of Indian National Army officers at the Red Fort spark protests across India.
  • 1946–1949: The Royal Indian Navy mutiny (February 1946) shakes British rule, India and Pakistan become independent (August 1947), and the Universal Declaration of Human Rights (1948) and new Geneva Conventions (1949) are adopted.
  • 1947–1991: The Marshall Plan rebuilds Western Europe, the Cold War divides the world, Germany is split until 1990, and dozens of colonies in Asia and Africa become independent nations.
  • Today: War cemeteries at Kohima, Imphal, and Delhi honour the fallen, VE Day and VJ Day are marked each year, and Auschwitz and Hiroshima’s Peace Memorial stand as warnings for the future.

Technology

  • Electronic computers: From codebreaking to business.
  • Jet airliners: From wartime jet engines.
  • Nuclear power: Peaceful uses of atomic energy.

Features

  • United Nations: A new world body.
  • Cold War: East against West.
  • Independence: India and decolonisation.

Allies and Axis

Major Battles and Campaigns

India in the Second World War

Indian Army soldiers in jungle-green uniforms, some in turbans and some in slouch hats, carrying rifles along a muddy track through bamboo forest beside a line of mules laden with supplies, with misty green mountains and monsoon clouds behind
Indian soldiers and supply mules on a jungle track on the India–Burma front (artistic illustration).

Science, Codes, and Weapons

Wooden hut with women in 1940s cardigans and skirts operating a long wall of electromechanical machines covered in rotating drums and patch cables, while a man in a tweed jacket studies paper strips at a desk lit by a lamp
Codebreakers operate electromechanical machines to crack enemy ciphers (artistic illustration).

Life on the Home Front

Families sheltering for the night on the platform of a curved, tiled underground railway tunnel, sleeping under blankets beside suitcases, a boy reading a book, an elderly woman knitting, and an air-raid warden in a steel helmet holding a lantern by the tracks
Families shelter overnight in an underground station during the Blitz (artistic illustration).

Second World War Timeline Summary

Test Your Knowledge

20 quick questions from the Second World War timeline. Click each question to reveal the answer.

Answer: The Great Depression.

Answer: The Munich Agreement.

Answer: Poland.

Answer: The Viceroy had declared India at war without consulting Indian leaders.

Answer: Lightning war.

Answer: Dunkirk.

Answer: The Battle of Britain.

Answer: 22 June 1941.

Answer: Japan’s attack on Pearl Harbor.

Answer: Singapore.

Answer: The Battle of Midway.

Answer: The Quit India Movement.

Answer: Stalingrad.

Answer: The Holocaust.

Answer: Subhas Chandra Bose.

Answer: Imphal and Kohima.

Answer: 6 June 1944.

Answer: Victory in Europe Day.

Answer: Hiroshima and Nagasaki.

Answer: The United Nations.

Classroom activity

Students Tasks

Use these prompts for discussion or projects on the Second World War.

Timeline understanding World history Map skills Cause and effect
  1. Make a timeline poster: 1 September 1939 Poland, 1940 Dunkirk, 7 December 1941 Pearl Harbor, 1943 Stalingrad, 1944 Imphal–Kohima and D-Day, 8 May 1945 VE Day, and 2 September 1945 Japan’s surrender.
  2. On a world map, shade the Allied and Axis countries and mark Dunkirk, Stalingrad, El Alamein, Pearl Harbor, Singapore, Imphal, Kohima, and Normandy.
  3. Draw a cause-and-effect chain from the Treaty of Versailles and the Great Depression to the invasion of Poland.
  4. Write a diary entry as a child sheltering from air raids during the Blitz in 1940.
  5. Make a fact card on the Battles of Imphal and Kohima and why they mattered for India.
  6. Compare how the Quit India Movement and the Indian National Army each tried to win India’s freedom.
  7. Find out how wartime codebreaking helped lead to modern computers, and present your findings.
  8. Research the Bengal famine of 1943 and explain its causes and effects.
  9. Design a remembrance display about the Holocaust, using survivors’ stories from a trusted museum website.
  10. Debate: “The United Nations has been more successful than the League of Nations.”

Continue exploring

The Second World War sped up the development of computers, penicillin and other medicines, radio news, and shipping. Explore these connected timelines next.

Moments Through Visual Stories

Click any panel to expand and explore the visual mood.

The Second World War in pictures — the evacuation from Dunkirk, a Blitz shelter, a Pacific aircraft carrier, the ruins of Stalingrad, Indian soldiers on the Burma front, wartime codebreakers, D-Day, the founding of the United Nations, and a Normandy beach then versus now.

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