The Great Depression began in 1929, brought about in part by the economic problems caused by the attempt to force Germany to pay for the war and in part by trade restrictions. Millions of people around the world lost their jobs. Governments changed in many countries, some by elections and some by revolutions. The governments soon fell into two main groups, those who believed in freedom and human rights and those who followed fascism. These two deeply different views led to a Second World War, which most people who write history feel began in Europe when Germany invaded Poland in 1939, but soon spread to most of the countries in the world. It took in wars which were already happening in other places, most notably the war between Japan and China. After this war Communism spread to Central and Eastern Europe, including the relatively new Eastern European countries of Yugoslavia, Bulgaria, Romania, Albania, and in Asia North Vietnam and North Korea, and, slightly later, to Cuba in the Carribean Sea very near to North America.