World war is also known as The great War.On the 28 June 1914, Gavrilo Princip, a Bosnian Serb student, killed Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, in Sarajevo. Princip was a member of Young Bosnia, a group whose aims included the unification of the South Slavs and independence from Austria-Hungary. The assassination in Sarajevo set into motion a series of fast-moving events that eventually escalated into full-scale war. Austria-Hungary demanded action by Serbia to punish those responsible, and when Austria-Hungary deemed Serbia had not complied, declared war. Major European powers were at war within weeks because of overlapping agreements for collective defense and the complex nature of international alliances.
The casualties were:
Military dead:
Military wounded: 12,831,500
Military missing: 4,121,000[1]
Military dead:
Military wounded: 8,388,000
Military missing: 3,629,000

lthough the conflict in India cannot be explicitly said to have been a part of the First World War, it can certainly be said to have been significant in terms of the wider strategic context. The British attempt to subjugate the tribal leaders who had rebelled against their British overlords drew away much needed troops from other theaters, in particular, of course, the Western Front, where the real decisive victory would be made.

The reason why some Indian and Afghani tribes rose up simply came down to years of discontent which erupted, probably not coincidentally, during the First World War. It is likely that the tribal leaders were aware that Britain would not be able to field the required men, in terms of either number or quality. They underestimated, however, the strategic importance placed on India by the British; despite being located far away from the epicenter of the conflict, it provided a bounty of men for the fronts. Its produce was also needed for the British war effort and many trade routes running to other profitable areas of the Empire ran through India. Therefore, although the British were not able to send the men that they wanted, they were able to send enough to resist the revolt of the tribesmen through a gradual but effective counter-guerilla war. The fighting continued into 1919 and in some areas lasted even longer.

World War I is a retronym for “The Great War” (a title previously used to refer to the Napoleonic Wars). It was also known as the 1914-18 War or 14-18 War, or sometimes “the war to end all wars” until World War II. “The Kaiser (or Kaiser’s) War”, “War of the Nations” and “War in Europe” were commonly employed as descriptions during the war itself and in the 1920s. In France and Belgium it was also sometimes referred to as La Guerre du Droit (‘the War for Justice’) or La Guerre Pour la Civilisation / de Oorlog tot de Beschaving (“the War to Preserve Civilization”), especially on medals and commemorative monuments. The term used by official histories of the war in Britain and Canada is First World War, while American histories generally use the term World War I. In Italy it is often referred to as “La Guerra del ’15 – ’18” (“The 1915 – 1918 War”), and more seldom as “The Fourth War of Independence”, following the other three conflicts waged against the Austrian Empire in the 19th century.