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World war 1 which is also referref to as the great war took place between the years of July 1914 and November 1918 and involved countries like Bulgaria, France, Germany, Italy, Japan, Ottoman Empire, Portugal, Russia, United Kingdom and the United States. The war was fueled by many factors among them the naval arms race between the Great Britain and the Ferman empire that made it hard for other countries to import food and other materials. It was also caused by the assassination of the Austrian archduke Franz Ferdinand by a Bosnian Serb, Gavrillo Princip. The Balkan wars and other factors also led to the war.
Thios war was so suvere that about 13 million civilians died as a result, not to mention 8.5 million soldiers who also died in battle. The war ended on 11th November 1918 when Germany signed an armistice agreement with the Allied movement.