Several declarations of war occur in August 1914: at the beginning of the month, Germany declares war on Russia and then on France. On 4 August, the United Kingdom declared war on Germany. A day later, the Austro-Hungarian Empire declared war on Russia.
Second phase (1915-1916)
Fights over territories that left many dead and wounded, this happened in sparsely populated and rural areas. " territorial conquests" were very slow.
Third phase (1917-1918)
Russia exits the war in 1917, and the United States enters the war to support the Triple Entente.
Died, approximately 9 million people (between civilians and military).
Disintegration of the Ottoman and Austro-Hungarian Empire
Development of various weapons of war, such as war tanks and airplanes.
development of industrialization
Effect 1: Signing of the Treaty of Versailles
Effect 2: formation of the league of nations
Was an international diplomatic group developed after World War I as a way to solve disputes between countries before they erupted into open warfare.
Signing of the Treaty of Versailles which imposed a series of sanctions on the defeated Germany.