With the Revolution of Industry, in Europe rivalry for marketing had increased. The European countries began to search for new colonies and they established alliances among themselves. This rivalry caused the World War I and the Ottoman Empire entered the war with Germany. The war begun in July 28 1914 and ended in 1918, millions of people died, thousands of people crippled and the world entered a period of economical declined after this war.

The Ottoman Empire fought in many front lines. The Turkish troops defended the country most courageously, Gallipoli is one of the most significant defences in history. But, Sultan Mehmed Resad just prayed for his army and not involved in any struggle, at last he died of a hearth attack in 1918.