Reasons:
Impose conditions on the surrender of militant forces retreating in the First World War, particularly Germany.
The rise of fascism in Italy, Nazism in Germany
Hitler built German army forces fast after he seized power in 1933 and re delivery of the Rhine basin in 1936.
Germany announced the annexation of Austria in September 1938.
Germany completed the occupation of Czechoslovakia in March 1939 after granting their parts under the Convention Munich in 1938.
Germany demanded the restoration of Danzj Hitler and the Polish Corridor.
Hitler signed a non-aggression pact the Soviet Union in August 1939.
Hitler attacked Poland in September 1, 1939 and occupied it in full.
Events:
France announced England and most countries of the Commonwealth war on Germany in 3/9/1939.
German forces occupied Denmark, Norway and the Netherlands in May 1940.
France surrendered on June 22 after being attacked by German forces storm.
British battle began when the Germans tried to force Britain to undergo operations through an intensive air bombardment; however, the British didn’t give up.
Germany invaded Hungary, Bulgaria and Yugoslavia in April 1941.
Hitler invaded Russia in June 23, 1941.
Japan attacked Pearl Harbor port, the Philippines and Malaysia in December 7, 1941.
The United States and its allies, most of Russia except for war on Japan in turn declared Germany and its allies except Finland war on the United States.
Troops arrived to Stalingrad axis and the Caucasus.
Italy surrendered in September 1943 after the Allied invasion of Sicily, southern Italy.
America won freedom in battles against Japan in the Coral Sea and Medway also recovered the Philippines in 1945.
Russia in 1943 has counter-attacked along the Front for the expulsion of the German armies reached Poland in 1944 and managed to expel the Axis forces from the Balkans.
In late 1944 after France was liberated by Allied forces landed in Normandy, western France and other forces in the south of France.
In May 7, 1945 Germany surrendered unconditionally.
Russia declared war on Japan and invaded Manchuria
6 August 1945 in the United States dropped the first atomic bomb on Hiroshima followed by another bomb in Nagasaki on August 9.
Japan announced in recognition of 14 August 1945 signed the terms of delivery in September 2, 1945.
The situation turned in the North Africa after the Allied victory and then landing of the U.S. in Algeria.
Result: 15million died