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World War II, or the Second World War, was a global military conflict. It began as the joining of what had initially been two separate conflicts, with the first beginning in Asia in 1937 (the Second Sino-Japanese War) and the other beginning in Europe in 1939 (the German and Soviet invasion of Poland).

The war split the majority of the world's nations into two opposing military alliances: the Allies and the Axis. It involved the mobilization of over 100 million military personnel, making it the most widespread war in history, and placed the participants in a state of "total war", which erased the distinction between civil and military resources and resulted in the complete activation of a nation's economic, industrial, and scientific capabilities for the purposes of the war effort. Over 70 million people, the majority of them civilians, were killed, making it the deadliest conflict in human history.

The Allies won the war, and as a result, the Soviet Union and the United States emerged as the world's leading superpowers. This set the stage for the Cold War, which lasted for the next 45 years. The United Nations was formed in the hope of preventing another such conflict. The self-determination spawned by the war accelerated decolonization movements in Asia and Africa, while Europe itself began moving toward integration.

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The Defense of Sihang Warehouse (simplified Chinese: 四行仓库; traditional Chinese: 四行倉庫; pinyin: Sìháng Cāngkù) took place from 26 October to 1 November 1937, and marked the beginning of the end of the three-month Battle of Shanghai in the opening phase of the Second Sino-Japanese War.Defenders of the warehouse, known in China as the Eight Hundred Heroes (simplified Chinese: 八百壮士; traditional Chinese: 八百壯士; pinyin: Bābǎi Zhùangshì), held out against numerous waves of Japanese forces and covered Chinese forces retreating west during the Battle of Shanghai. The successful defense of the warehouse provided a morale-lifting consolation to the Chinese army and people in the demoralizing aftermath of the Japanese invasion of Shanghai. The warehouse's location just across the Suzhou Creek from the foreign concessions in Shanghai meant the battle took place in full view of the western powers. This drew the attention, if only briefly, of the international community to Chiang Kai-shek's bid for world-wide support against Japanese aggression.


Selected equipment

Char T-34.jpg
The T-34 was a Soviet medium tank produced from 1941 to 1958. It is widely regarded to have been the world's best tank when the Soviet Union entered World War II, and although its armor and armament were surpassed by later tanks of the era, it is credited as the war's most effective, efficient and influential design.First produced at the KhPZ factory in Kharkov (Kharkiv, Ukraine), it was the mainstay of Soviet armoured forces throughout World War II, and widely exported afterwards. It was the most-produced tank of the war, and the second most-produced tank of all time, after its successor, the T-54/55 series.A 1996 publication showed that the T-34 was still in service with twenty-seven countries.The T-34 was developed from the BT series of fast tanks, and was intended to replace both the BT-5 and BT-7 tanks and the T-26 infantry tank in service (Zaloga & Grandsen 1984:66, 111).At its introduction, it was the tank with the best balanced attributes of firepower, mobility, and protection in existence, although initially its battlefield effectiveness suffered from the unsatisfactory ergonomic layout of its crew compartment, lack of radios and poor tactical employment.


Selected battle

The heavily damaged Japanese cruiser Aoba disembarks dead and wounded crewmembers near Buin, Bougainville and the Shortland Islands a few hours after the battle on October 12, 1942.
The Battle of Cape Esperance, also known as the Second Battle of Savo Island and, in Japanese sources, as the Sea Battle of Savo Island (サボ島沖海戦), took place October 11 – 12, 1942, and was a naval battle of the Pacific campaign of World War II between the Imperial Japanese Navy and United States Navy. The battle was the third of five major naval engagements during the Guadalcanal campaign and took place at the entrance to the strait between Savo Island and Guadalcanal in the Solomon Islands.On the night of October 11, Japanese naval forces in the Solomon Islands area, under the command of Gunichi Mikawa, sent a major supply and reinforcement convoy to their forces on Guadalcanal. The convoy consisted of two seaplane tenders and six destroyers and was commanded by Rear Admiral Takatsugu Jojima. At the same time but in a separate operation, three heavy cruisers and two destroyers under the command of Rear Admiral Aritomo Gotō were to bombard the Allied airfield on Guadalcanal (called Henderson Field by the Allies) with the object of destroying Allied aircraft and the airfield's facilities.


Selected picture

General Dwight D. Eisenhower addresses American paratroopers prior to D-Day.
Credit: United States Army
General of the Army Dwight D. Eisenhower gives the order of the day, "Full victory – nothing else", to paratroopers of the 502nd Infantry Regiment, 101st Airborne Division, at RAF North Witham in England, just before they board their airplanes to participate in the first assault of the D-Day invasion. Eisenhower's success in planning and executing the battle led him to be seen as a hero by the American public.

Selected biography

Franklin D. Roosevelt
Franklin Delano Roosevelt often referred to by his initials FDR, was the thirty-second President of the United States. Elected to four terms in office, he served from 1933 to 1945 and is the only U.S. president to have served more than two terms. He was a central figure of the 20th century during a time of worldwide economic crisis and world war. During the Great Depression of the 1930s, Roosevelt created the New Deal to provide relief for the unemployed, recovery of the economy, and reform of the economic and banking systems. Although recovery of the economy was incomplete until almost 1940, the programs he initiated such as the Federal Deposit Insurance Corporation (FDIC), Tennessee Valley Authority (TVA), and the United States Securities and Exchange Commission (SEC) continue to have instrumental roles in the nation's commerce. One of his most important legacies is the Social Security system. As Britain warred with Nazi Germany, Roosevelt provided Lend-Lease aid to Winston Churchill and the British war effort before America's entry into World War II in December, 1941.


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"I cannot forecast to you the action of Russia. It is a riddle wrapped in a mystery inside an enigma: but perhaps there is a key. That key is Russian national interest."
Winston Churchill, 1 October 1939

Topics

World War II
Theatres Main events Specific articles Participants

Prelude
Causes
in Europe
in Asia

Main theatres
Europe
Eastern Europe
China
Mediterranean, Middle East and Africa
Asia and the Pacific
Atlantic

General timeline
Timeline

1939
Invasion of Poland
Winter War

1940
Invasion of Denmark/Norway
Battle of France
Battle of Britain

1941
Invasion of the Soviet Union
Battle of Moscow
Attack on Pearl Harbor

1942
Battle of Midway
Battle of Stalingrad
Second Battle of El Alamein

1943
Battle of Kursk
Guadalcanal campaign
Invasion of Italy

1944
Battle of Normandy
Operation Bagration
Battle of Leyte Gulf
Operation Market Garden
Battle of the Bulge

1945
Battle of Iwo Jima
Battle of Okinawa
Battle of Berlin
End in Europe
Hiroshima and Nagasaki
Surrender of Japan

more...

Blitzkrieg
Cryptography
Equipment
Home Front
Military engagements
Production
Resistance
Technology

Civilian impact and atrocities
Nanking Massacre
The Holocaust
Siege of Leningrad
Bataan Death March
Dutch famine of 1944
Bengal famine of 1943
Hiroshima and Nagasaki
Unit 731
Strategic bombings
Comfort women
Allied war crimes
German war crimes
Japanese war crimes

Aftermath
Effects
Casualties
Expulsion of Germans
Denazification
Cold War
Universal Declaration of Human Rights
Decline of the British Empire

The Allies
Australia Australia
Belgium Belgium
Brazil Brazil
British Raj British India
Canada Canada
Czechoslovakia Czechoslovakia
Kingdom of Egypt Egypt
El Salvador El Salvador
French Third Republic France (after June 16, 1940: Free France Free France)
Kingdom of Greece Greece
Netherlands Netherlands
Dominion of New Zealand New Zealand
Norway Norway
Commonwealth of the Philippines Philippines
Poland Poland
Republic of China (1912–1949) Republic of China
Union of South Africa South Africa
Soviet Union Soviet Union
United Kingdom United Kingdom
United States United States
Kingdom of Yugoslavia Yugoslavia

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The Axis
Kingdom of Bulgaria Bulgaria
 Croatia
Empire of Japan Japan
Finland Finland
 Vichy France
Kingdom of Hungary (1920–1946) Hungary
Kingdom of Italy Italy
Nazi Germany Germany
Kingdom of Romania Romania
Thailand Thailand
 Slovakia

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Things you can do

From the World War II task force of the Military history WikiProject:

Attention needed
...to referencing and citation  • ...to coverage and accuracy  • ...to structure  • ...to grammar  • ...to supporting materials 
Popular pages
Full list
Cleanup needed
Battle of Kiev (1943)Battle of Ko ChangColditz CastleSpiritual national defenceTuskegee Airmen
Requested articles 
Battle of Uhtua-KiestinkiBattles of Repola-RukajärviBattle of SiiranmäkiBattle of ŁuckBattle of RówneBattle of Włodzimierz WołyńskiBattle of LubartówBattle of MiednikiBattle of JodłaFrancis BlanchainShinshou DraengerChrister Lyst HansenHolocaust slave labor litigation (draft) • Ove KampmanLeague for Combat PolicyJulien MelineOperation BigotOperation MittelmeerOperation RichardOtto ProgramMartin PoppelRoehm's AvengersDorothy TartierePoul BruunRaoul BoulangerSerge Asher-RavanelBattle of West Ukraine (1941)Battle of ZunyiFree Dutch Forces (draft, please assist) • Liberation of Denmark (currently redirect) • Operation Vado (currently redirect) • Finnish 19th Division (Continuation War)Finnish 11th Division (Continuation War)Finnish VII Corps (Continuation War)Finnish VI Corps (Continuation War)Finnish IV Corps (Continuation War)Finnish Cavalry Brigade1st Jaeger Brigade2nd Jaeger BrigadeFinnish 1st Division (Continuation War)168th Rifle Division (Soviet Union)71st Rifle Division (Soviet Union)Group OinonenA.S. KsenofontovSiege of Tobruk (June 1942)5th Guards Fighter Aviation Regiment (ru) • Novorossiysk-Taman operation (ru) • 1943 Novorossiysk operation (ru) • 1943 Aerial Battles over Kuban (ru) • Battle of Rostov (1943) (ru) • Olshansky amphibious landing (ru) • Nalchik-Ordzhonikidzevskaya operation (ru) • Bukrinsky landing (ru) • Cape Tarhan Landing (ru) • 1942 Sudak Landing (ru) ] • Turning point of World War II
Expansion needed
Princess Irene BrigadeBattle of Bay of ViipuriDemilitarisation; Martha DesrumeauxMochitsura HashimotoOperation CascadeOperation Tan No. 2Burma Area ArmyBattle of CourlandBattle of Munda PointBattle of Voronezh (1943)Drive on Munda PointFirst Battle of KharkovRace to BerlinMarie FourcadeVictor Strydonck de BurkelDonald BlakesleeOperation NordwindBattle of Skerki BankMichael Sinclair (soldier)Battle of MaastrichtBattle of ZeelandLandings on RendovaNew Georgia counterattackOperation WaterfallPetsamo–Kirkenes OffensiveRaid on ChoiseulAmerican-British-Dutch-Australian CommandBattle of Viru HarborBattle of Wickham AnchorageWestern New Guinea campaign (and the individual battles of the campaign) • Operation Blockbustermore
Images needed
Twelfth Army (United Kingdom)4th Airborne Division (United Kingdom)5th Airborne Division (United Kingdom)XVI Corps (United Kingdom)Battle of DakarBattle of the Lys (1940)Battle of ZeelandBattle of the GrebbebergFranco-Thai WarBattle of Ko ChangSwitzerland during the World WarsBerthe FraserWestern Allied invasion of Germany
Merging needed
Add an article here!
Citations needed
Battle of Borneo (1941–42)Battle of ImphalGarderegiment Fuseliers Prinses IreneJapanese invasion of French IndochinaJapanese invasion of ThailandLuxembourg in World War IINew Georgia CampaignOperation CartwheelOperation ChastiseRoyal Netherlands Motorized Infantry BrigadeSolomon Islands campaignBattle of Radom
Translation needed 
pt:Tobrouk (militar)

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