World War I (knows also as the Great War), started on 28 July 1914 and lasted until 11 November 1918. During that time more than 9 million soldiers and 7 million civilians died! The war was between two alliances. The Allies were United Kingdom, France and Russia.
Their enemies were Germany and Austria-Hungary, known as the Central Powers. Italy was with Germany and Austria-Hungary, but it didn’t join the Central Powers. The number of members in these alliances increased when more nations entered into war. Japan and the United States joined the Allies. On the other side, Ottoman Empire and Bulgaria joined the Central Powers. During World War I, more than 70 million of military personnel were mobilized!
The World War I started after the assassination of Archduke Franz Ferdinand of Austria, in Sarajevo, 28 June 1914. He was killed by Gavrilo Princip, a Yugoslav nationalist. Soon after the assassination, Austria-Hungary delivered an ultimatum to the Kingdom of Serbia. They had many minor conflicts in the past, so this was the excuse, of Austria-Hungary to attack the Kingdom of Serbia. After a few weeks, those countries were at war, which spread to the rest of Europe.
After 4 years of war, Austro-Hungarian Empire, agreed on an armistice, on 4 November 1918. German agreed to armistice on 11 November the same year. The World War I was ended in victory for the Allies. This was end for four imperial powers: Russia, Germany, the Ottoman Empire and Austro-Hungarian Empire! Germany was humiliated in this war. This is one of the reasons for World War II.
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