World War I: It started in 1914., It ended in 1918 when Germany surrendered., It had four MAIN causes: militarism, alliances, imperialism and nationalism., It burst out when Austro-hungarian empire attacked Serbia., Serbian nationalists assassinated Archduke Franz Ferdinand., The USA joined in 1917., The Central Powers included Austro-hungarian empire, Germany and Italy., In 1919 the Treaty of Versailles determined Germany was responsible for starting the war., It lasted for four years., World War II: It started in 1939., It started because Germany invaded Poland., The Nazi party, led by Adolf Hitler, won the elections in Germany., People in Germany were discontent because there was a great economic crisis., Japan and Italy supported Germany. They formed the Axis Powers., In 1941, Japan bombed Pearl Harbour. As a consequence, the USA joined in the war., The war ended in Europe (VE-Day) on 7th May 1945, when Germany surrendered., In August 1945 the USA used atomic bombs on Japanese cities Hiroshima and Nagasaki., The WWII officially finished on 2nd September 1945 when Japan surrendered (VJ-Day)., German Nazis persecuted and executed Jews (Holocaust).,

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