Fighting also took place in Africa, China, at sea and in the air. The other main areas of fighting were in the Middle East, in the Gallipoli region of the Ottoman Empire and between Italy and Austria-Hungary.

Fighting on the eastern front was not trench warfare as in the west, but mobile warfare. The Russians fought the Germans and Austro-Hungarians on the Eastern Front in Central and Eastern Europe. Most of the fighting on the western front was trench warfare. Germany had tried to defeat France quickly with the Schlieffen Plan but were stopped in the First Battle of the Marne. The French and the British fought the Germans on the Western Front in France and Belgium.

There was fighting in many different fronts (areas). The two sides were the Allied Powers (mainly Russia, France, the British Empire and later the United States) and the Central Powers (mainly Germany, Austria-Hungary and the Ottoman Empire). Russia then declared war on Austria-Hungary, which set off a chain of events in which members from both groups of countries declared war on each other. When Archduke Franz Ferdinand of Austria was assassinated on June 28, 1914, Austria-Hungary blamed Serbia and declared war on it. However, that made them divide themselves into two groups. īefore the war, European countries had formed alliances to protect themselves. There were 135 countries that took part in World War I, and nearly 10 million people died while fighting. Other names are the Imperialist War and the Four years War. Before World War II began in 1939, World War I was called the Great War, or the World War. Soldiers from many countries took part, and it changed the colonial empires of the European powers. Most of the fighting was in continental Europe. It was a global war and lasted exactly 4 years, 3 months and 2 weeks.

World War I ( WWI or WW1), also called the First World War, began on Jand lasted until November 11, 1918. Map of Europe at the start of World War I.

Who won world war 3