World War I lasted from 28 July 1914 to 11 November 1918 while World War II lasted from 1939 to 1945.
Explanation:
World war I : The First World War is primarily called the Great War prevailing in Europe from 1914 to 1918. This great war was fought in Europe, Asia and Africa on three continents and sea, earth and sky.
Militarism, Alliances, Imperialism and Nationalism were four causes of WWI
World War II : Germany, Italy, and Japan—and the Allies—France, Great Britain, the United States, the Soviet Union, and, to a lesser extent, China. Treaty of Versailles. The Treaty of Versailles ended World War I between Germany and the Allied Powers, Japanese Expansion, Fascism, Hitler and the Nazi Party, Appeasement, Great Depression were the causes of WWII.