World war II started on September 3rd 1939 and ended on 1945.After World War I ended in 1918 Germany became a very poor country after the war and they had nothing. In 1933 most people in Germany voted for Adolf Hitler. He lead a party called the Nazis and Hitler made promises that he will make Germany better. Then German soldiers went to Poland and invaded it.England and France told Hitler if you invade Poland we will declare war on Germany but Hitler did not listen.After that England and France declared war on Germany and that's how it all started after the war Hitler committed suicide because he lost the world war II (WWII).