World War II
1939–1945 · The Deadliest Armed Conflict in Human History
September 1, 1939 – September 2, 1945 · 6 Years of Global War
70-85M
Total Deaths (3% of World Pop.)
30+
Nations at War
$4.1T
Total Cost (2022 dollars)
486,000
Aircraft Used in Conflict
Key Battles
Battle of Britain (1940)
RAF vs. Luftwaffe · Air War
The first major campaign fought entirely in the air. Germany's Luftwaffe tried to gain air superiority over Britain for an invasion. The RAF held — Churchill's "finest hour." The first German defeat of the war, ending Operation Sea Lion.
Battle of Stalingrad (1942–43)
Eastern Front · Turning Point
The bloodiest battle in history — over 2 million casualties. Germany's 6th Army was surrounded and destroyed in brutal urban combat. Field Marshal Paulus surrendered 91,000 survivors. The psychological and strategic turning point of the war.
D-Day / Normandy (1944)
June 6, 1944 · The Great Crusade
The largest amphibious invasion in history — 156,000 troops landed on 5 beaches in a single day. Meticulous deception (Operation Bodyguard) convinced Germany the real attack would be at Pas-de-Calais. Opened the Western Front that doomed Nazi Germany.
Battle of Midway (1942)
Pacific Theater · Naval Turning Point
US Navy intelligence cracked Japanese codes, enabling an ambush. Japan lost 4 fleet carriers and hundreds of experienced pilots in three days — irreplaceable losses. The tide in the Pacific turned permanently after this battle.
Operation Barbarossa (1941)
Germany Invades USSR
The largest military operation in history — 3 million Axis soldiers invaded the Soviet Union along a 2,900km front. Initial success was staggering, but the Soviet Union's vast territory, brutal winter, and inexhaustible manpower ultimately defeated Germany.
Atomic Bombings (1945)
Hiroshima & Nagasaki · Aug 6 & 9
The US dropped atomic bombs on Hiroshima (140,000 dead) and Nagasaki (80,000 dead). Japan surrendered on August 15. The nuclear age began. No nuclear weapon has been used in war since — the most consequential restraint in history.
Key Leaders
Winston Churchill
UK Prime Minister · 1940–1945
Became PM as France fell and Britain stood alone. His speeches ("We shall fight on the beaches") rallied a nation. Master strategist who forged the Allied coalition. Refused to negotiate with Hitler in 1940 when many urged peace.
Franklin D. Roosevelt
US President · 1939–1945
Navigated isolationist America into the war through Lend-Lease, then Pearl Harbor. Managed the greatest industrial mobilization in history, turning the US into the "Arsenal of Democracy." Died April 12, 1945 — 25 days before Germany surrendered.
Josef Stalin
Soviet Premier · Eastern Front
Led the Soviet Union through catastrophic initial defeats to ultimate victory. The USSR suffered 27 million deaths — over 70% of all Allied fatalities. Stalin's decisions were often catastrophic; his nation's resilience was extraordinary.
Dwight D. Eisenhower
Supreme Allied Commander
Commanded the Allied forces in North Africa, Sicily, Italy, and the D-Day invasion. His greatest skill was political — managing the enormous egos of generals like Patton and Montgomery. Later became the 34th US President.
Timeline of World War II
Sep 1939
Germany Invades Poland
Germany launches Blitzkrieg (lightning war) against Poland. Britain and France declare war on Germany. The Soviet Union invades Poland from the east under the Molotov-Ribbentrop Pact. Poland falls in 36 days.
Jun 1940
France Falls
Germany's armored thrust through the Ardennes flanks the Maginot Line. France surrenders in 6 weeks. 338,000 Allied troops are evacuated from Dunkirk. Britain stands alone.
Dec 1941
Pearl Harbor — America Enters
Japan attacks the US Pacific Fleet at Pearl Harbor, killing 2,403 Americans. The US declares war on Japan; Germany and Italy declare war on the US. The global nature of the conflict is complete.
Feb 1943
Stalingrad — Germany Broken
Field Marshal Paulus surrenders the German 6th Army — 91,000 survivors of over 300,000. Germany never regains the strategic initiative on the Eastern Front. The war's tide has definitively turned.
Jun 1944
D-Day: Liberation Begins
Operation Overlord: 156,000 Allied troops storm Normandy beaches. Paris is liberated in August. Germany begins retreating on all fronts as Soviet forces close in from the east.
May 1945
V-E Day: Germany Surrenders
Adolf Hitler commits suicide on April 30. Germany surrenders unconditionally on May 7-8. Victory in Europe (V-E Day). The war in the Pacific continues.
Sep 1945
V-J Day: Japan Surrenders
After atomic bombings and Soviet declaration of war, Japan surrenders on August 15, signed September 2 aboard the USS Missouri. World War II is over. The United Nations is founded.
WWII Radar — Eyes in the Dark
Click to add contacts — radar sweeps the sky for enemy aircraft like the Chain Home system defending Britain
📷 Gallery
Into the Jaws of Death — Omaha Beach, 1944
US Army soldiers of the 1st Infantry Division wade ashore at Omaha Beach under German fire, June 6, 1944. This iconic photograph by Robert F. Sargent captures the opening moments of the liberation of Western Europe.
Stalingrad — City of Death, 1942–43
The Battle of Stalingrad reduced the city to rubble. Soldiers fought room-by-room in "Rattenkrieg" (rat war). Over 2 million people died in this single battle — the bloodiest in human history.
Urban Combat at Stalingrad
German infantry advances through the shattered streets of Stalingrad, 1942. The city's ruins provided cover for Soviet defenders who traded lives for time, waiting for the encirclement to close.
Luftwaffe Bombing Stalingrad, 1942
German aircraft bomb Stalingrad in August 1942. The Luftwaffe reduced the city to rubble before the ground assault — ironically creating perfect defensive terrain for Soviet troops.
Victory over the Reichstag, Berlin, 1945
Soviet soldiers raise the Red Banner over the ruins of the Reichstag on May 2, 1945 — one of the most iconic images of WWII. The photograph by Yevgeny Khaldei symbolized the fall of Nazi Germany.
Atomic Bomb over Nagasaki, 1945
The mushroom cloud from the "Fat Man" plutonium bomb rose 18km above Nagasaki on August 9, 1945. The blast killed 40,000 instantly and up to 80,000 by year's end. Japan surrendered six days later.
Ju 87 Stuka — The Blitz Symbol
Junkers Ju 87 Stuka dive bombers in formation. Fitted with "Jericho trumpets" wind sirens, the Stuka's screaming dive became a symbol of German Blitzkrieg terror across Europe and North Africa.
Nuremberg Rally — The Third Reich
Hitler addresses the Nazi Party at the Nuremberg Rally. The annual rallies, staged by Albert Speer as "cathedrals of light," showcased the full spectacle of totalitarian propaganda and military might.