question: what happened in world War 2, and why did it happen?
comment: 1. War happened. You'll learn more when you reach middle school and take your history lessons. 2. Because we treated the Germans really badly after WW1 they elected a Adolf Hitler, a known power tripper, as their leader who eventually attacked Poland starting the European front, and because the Japanese were also on a really huge power trip and attacked basically whole of Asia and America starting the Pasific front.
passages: Section::::World War II.
   Causes of World War II
  
  Among the causes of World War II were, to a greater extent, the political takeover in 1933 of Germany by Adolf Hitler and his Nazi Party and its aggressive foreign policy, and to a lesser extent, Italian Fascism in the 1920s, and Japanese militarism preceding an invasion of China in the 1930s. The immediate cause was Germany invading Poland on September 1, 1939, and Britain and France declaring war on Germany on September 3, 1939.
   Events preceding World War II in Europe
  
  The events preceding World War II in Europe are closely tied to the bellicosity of Italy, Germany and Japan, as well as the Great Depression. The peace movement led to appeasement and disarmament. 
  
  Section::::Aftermath of World War I.
  
  World War II is generally viewed as having its roots in the aftermath of World War I, in which the German Empire under Wilhelm II, with its Central Powers, was defeated, chiefly by the United Kingdom, France, and the United States.
   Section::::Specific developments.:Danzig crisis.:Invasion of Poland.
   Section::::Interrelations and economics.:French security demands.:Germany's reaction to Treaty of Versailles.
   Section::::Interrelations and economics.:The Mason-Overy Debate: "The Flight into War" theory.
   Section::::Impact.:Home fronts and production.
   Section::::Course of the war.:War breaks out in Europe (1939–40).
   March 28
  
  April 3
  
  June 7
  
  July 24
  
  August 31
  
  October 29
  
  Section::::1930.
  
  April 22
  
  June 30
  
  September 14
  
  Section::::1931.
  
  May 19
  
  September 18
  
  September 19
  
  Section::::1932.
  
  January 7
  
  January 28
  
  February 27
  
  March 1
  
  April 10
  
  May 30
  
  August 30
  
  November 21
  
  December 3
  
  Section::::1933.
  
  January 1
  
  January 30
  
  February 27
  
  February 28
  
  March 4
  
  March 20
  
  March 23
  
  March 24
  
  March 27
  
  April 1
  
  April 26
  
  May 2
  
  May 15 
  
  May 31
  
  June 21
  
  July 14
  
  August 25
  
  September 12
  
  October 19
  
  November 24
  
  Section::::1934.
  
  January 26
  
  February 12–16
  
  March 20
  
  June 30
  
  July 20
  
  July 25
   Section::::Interrelations and economics.:Failure of the League of Nations.
   Section::::History.:Re-release.
   Section::::History.
  
  Section::::History.:Initial release.
   Four days later the U.S was brought into the European war when on December 11, 1941, Nazi Germany and Fascist Italy declared war on the United States. Hitler chose to declare that the Tripartite Pact required that Germany follow Japan's declaration of war; although American destroyers escorting convoys and German U-boats were already de facto at war in the Battle of the Atlantic. This declaration effectively ended isolationist sentiment in the U.S. and the United States immediately reciprocated, formally entering the war in Europe.
  
  Section::::See also.
  
  BULLET::::- International relations (1919–1939)
  
  BULLET::::- Timeline of events preceding World War II
   Section::::Interrelations and economics.:Problems with the Treaty of Versailles.
   Section::::Specific developments.:Munich Agreement.:German occupation and Slovak independence.
  
  In March 1939, breaking the Munich Agreement, German troops invaded Prague, and with the Slovaks declaring independence, the country of Czechoslovakia disappeared. The entire ordeal was the last show of the French and British policy of appeasement.
  
  Section::::Specific developments.:Italian invasion of Albania.
   August 2
  
  August 8
  
  September
  
  October 16
  
  December 1
  
  December 5
  
  December 29
  
  Section::::1935.
  
  January 7
  
  June 18
  
  August 31
  
  September 15
  
  October 2
  
  November 14 
  
  Section::::1936.
  
  January
  
  February 6
  
  March 7
  
  March 25
  
  May 5
  
  June 3
  
  July 17
  
  August 1
  
  October
  
  October 18
  
  November 14
  
  November 15
  
  November 25
  
  December 1
  
  December 12
  
  December 23
  
  December 24
  
  Section::::1937.
  
  January 20
  
  May 28
  
  July 7
  
  August 13
  
  October 5
  
  November 6
  
  November 26
  
  December 1
  
  December 8
  
  December 11
  
  December 12
  
  December 13
  
  Section::::1938.
  
  January 26
  
  March 6
  
  March 13
  
  March 24
  
  July 6–16
  
  July 29
  
  August
   Section::::Background.
  
  Section::::Background.:Europe.
  
  World War I had radically altered the political European map, with the defeat of the Central Powers—including Austria-Hungary, Germany, Bulgaria and the Ottoman Empire—and the 1917 Bolshevik seizure of power in Russia, which eventually led to the founding of the Soviet Union. Meanwhile, the victorious Allies of World War I, such as France, Belgium, Italy, Romania and Greece, gained territory, and new nation-states were created out of the collapse of Austria-Hungary and the Ottoman and Russian Empires.
   BULLET::::- 22: Germany invades the Soviet Union with Operation Barbarossa, a three-pronged operation aimed at Leningrad, Moscow, and the southern oil fields of the Caucasus, ending the Molotov–Ribbentrop Pact. Romania invades south-western border areas of the Soviet Union in Europe on the side of Germany.: British general in Libya/Egypt Wavell is replaced by General Auchinleck.: June Uprising against the Soviet Union in Lithuania.
   Tensions created by those ideologies and the dissatisfactions of those powers with the interwar international order steadily increased. Italy laid claim on Ethiopia and conquered it in 1935, Japan created a puppet state in Manchuria in 1931 and expanded beyond in China from 1937, and Germany systematically flouted the Versailles treaty, reintroducing conscription in 1935 with the Stresa Front's failure after having secretly started re-armament, remilitarizing the Rhineland in 1936, annexing Austria in March 1938, and the Sudetenland in October 1938.
   Section::::Between the wars.:Preparing for World War II.
   Section::::End of the Curse.
   Section::::Specific developments.:Spanish Civil War.
  
  Between 1936 and 1939, Germany and Italy lent support to the Nationalists led by general Francisco Franco in Spain, while the Soviet Union supported the existing democratically elected government, the Spanish Republic, led by Manuel Azaña. Both sides experimented with new weapons and tactics. The League of Nations was never involved, and the major powers of the League remained neutral and tried (with little success) to stop arms shipments into Spain. The Nationalists eventually defeated the Republicans in 1939.
   Section::::Population movements.:Racial tensions.
   November 9
  
  Section::::1922.
  
  February 6
  
  March
  
  April 16
  
  August 13
  
  October
  
  October 11
  
  October 29
  
  November 1
  
  Section::::1923.
  
  January 11
  
  June
  
  July 24
  
  August 31
  
  September 27
  
  October 29
  
  November 8
  
  Section::::1924.
  
  January 21
  
  February 1
  
  March 16
  
  April 1
  
  April 6
  
  June 10
  
  August 16
  
  August 18
  
  Section::::1925.
  
  May 12
  
  July 18
  
  December 1
  
  Section::::1926.
  
  January 3
  
  January 31
  
  April 4
  
  April 24
  
  September 8
  
  December 25
  
  Section::::1927.
  
  April 12
  
  May 20
  
  June 7
  
  November 12
  
  December 14
  
  Section::::1928.
  
  May 3
  
  May 28
  
  June 4
  
  August 2
  
  August 27
  
  October 1
  
  Section::::1929.
  
  February 9
  
  February 11
  
  March 4
   BULLET::::- 2: Prime Minister Tojo rejects "peace feelers" from the US.: A German combat engineer patrol reaches the town of Khimki while scouting for a hole in the Russian defense perimeter around Moscow. It is the closest advance the Germans make to the Russian capital.
  
  BULLET::::- 3: Conscription in the United Kingdom now includes all men between 18 and 50. Women will not be neglected since they will serve in fire brigades and in women's auxiliary groups.
  
  BULLET::::- 3: General strike begins among native mine-workers in the Belgian Congo.
  