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World War I: A Global Conflict that Shaped the Modern Era

World War I, also known as the Great War or the European War, was a global conflict that lasted from July 28, 1914 to November 11, 1918. It involved two opposing coalitions of nations: the Allies (France, Russian Empire, Great Britain, Serbia, and later the United States) against the Central Powers (Germany, Austro-Hungary, Ottoman Empire, and Bulgaria). The war was one of the deadliest conflicts in human history, with over 70 million soldiers mobilized and more than 15 million people killed.

The immediate cause of the war was the assassination of Archduke Franz Ferdinand, the heir to the throne of Austria-Hungary, by a Serbian terrorist on June 28, 1914. However, the conflict had deeper roots in imperialist policy and the complex system of military alliances that had developed in Europe over several decades. The war began with Germany's invasion of Belgium and Luxembourg, followed by Austro-Hungarian attacks on Serbia and Russian advances against Prussia.

The early years of the war saw a series of stalemates, as both sides dug in along the Western Front, which stretched from the North Sea to the Swiss border. However, in 1917, the United States entered the conflict, providing a significant boost to the Allied forces. The following year, Russia and Romania were forced out of the war, but the Central Powers' advance was halted by the Allies.

The final months of the war saw a series of decisive battles on both fronts. In August 1918, the Allied Hundred Days Offensive began, pushing back the German front line and ultimately leading to the collapse of the Central Powers. The Ottoman Empire had already withdrawn from the conflict in October 1918, while Bulgaria followed suit in September.

The Armistice that ended hostilities was signed on November 11, 1918, marking a new era for Europe and the world. The war led to the dissolution of several empires, including those of Germany, Austria-Hungary, Russia, and the Ottoman Empire, resulting in the creation of new independent states such as Poland, Finland, the Baltic States, Czechoslovakia, and Yugoslavia.

The aftermath of World War I saw a significant shift in global politics, with the rise of new world powers like the United States and the Soviet Union. The war also had profound social and economic impacts, including