- published: 31 Jan 2013
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The history of the United States as covered in schools and universities typically begins with either 1492 and Columbus, or—especially in recent years—with the prehistory of the Native peoples. Officially the United States of America began as an independent nation with the Declaration of Independence in July 1776. European colonists reached the Gulf and Pacific coasts, but the largest settlements were by the English on the East Coast, starting in 1607. By the 1770s the Thirteen Colonies contained two and half million people. They were prosperous, and had developed their own political and legal systems. The British government's threat to American self-government led to war in 1775 and the Declaration of Independence in 1776. With major military and financial support from France, the patriots won the American Revolution. In 1789 the Constitution became the basis for the United States federal government, with war hero George Washington as the first president. The young nation continued to struggle with the scope of central government and with European influence, creating the first political parties in the 1790s, and fighting a second war for independence in 1812.
World War I (WWI), which was predominantly called the World War or the Great War from its occurrence until 1939 (World War II), and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It involved all the world's great powers, which were assembled in two opposing alliances: the Allies (based on the Triple Entente of the United Kingdom, France and Russia) and the Central Powers (originally centred around the Triple Alliance of Germany, Austria-Hungary and Italy; but, as Austria–Hungary had taken the offensive against the agreement, Italy did not enter into the war). These alliances both reorganised (Italy fought for the Allies), and expanded as more nations entered the war. Ultimately more than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history. More than 9 million combatants were killed, largely because of enormous increases in lethality of weapons, thanks to new technology, without corresponding improvements in protection or mobility. It was the sixth-deadliest conflict in world history, subsequently paving the way for various political changes such as revolutions in the nations involved.