Title: Decolonization of the Americas
Content:  The United States of America declared independence from Great Britain on July 4, 1776, thus becoming the first independent, foreign-recognized nation in the Americas and the first European colonial entity to break from its mother country. Britain formally acknowledged American independence in 1783 after its defeat in the American Revolutionary War. The U.S. victory encouraged independent movements in other parts of the Americas. Although initially occupying only the land east of the Mississippi between Canada and Florida, the United States would later eventually acquire various other North American territories from the British, French, Spanish, and Russians in succeeding years, effectively decolonizing these areas formerly under European control.
Title: History of the United States (1776–1789)
Content:  Between 1776 and 1789 thirteen British colonies emerged as a newly independent nation, the United States of America. Fighting in the American Revolutionary War started between colonial militias and the British Army in 1775. The Second Continental Congress issued the Declaration of Independence on July 4, 1776. Under the leadership of General George Washington, the Continental Army and Navy defeated the British military securing the independence of the thirteen colonies. In 1789, the 13 states replaced the Articles of Confederation of 1777 with the Constitution of the United States of America. With its amendments, it remains the fundamental governing law of the United States.
Title: History of colonialism
Content:  formed by the United Colonies, and independence was declared by the Second Continental Congress on 4 July 1776. A new nation was born, the United States of America, and all royal officials were expelled. On their own the Patriots captured a British Invasion army and France recognized the new nation, formed military alliance, declared war on Britain, and left the superpower without any major ally. The American War of Independence continued until 1783, when the Treaty of Paris was signed. Britain recognised the sovereignty of the United States over the territory bounded by the British possessions to the North, Florida to the South, and the Mississippi River to the west.
Title: History of the Americas
Content:  languages, the most widespread being Spanish (376 million speakers), English (348 million) and Portuguese (201 million). The colonial period lasted approximately three centuries, from the early 16th to the early 19th centuries, when Brazil and the larger Hispanic American nations declared independence. The United States obtained independence from Great Britain much earlier, in 1776, while Canada formed a federal dominion in 1867 and received legal independence in 1931. Others remained attached to their European parent state until the end of the 19th century, such as Cuba and Puerto Rico which were linked to Spain until 1898. Smaller territories such as Guyana obtained independence in the mid-20th century, while certain Caribbean islands and French Guiana remain part of a European power to this day.
Title: United States
Content:   The American Revolutionary War fought by the Thirteen Colonies against the British Empire was the first successful war of independence by a non-European entity against a European power in modern history. Americans had developed an ideology of "republicanism", asserting that government rested on the will of the people as expressed in their local legislatures. They demanded their "rights as Englishmen" and "no taxation without representation". The British insisted on administering the empire through Parliament, and the conflict escalated into war. The Second Continental Congress unanimously adopted the Declaration of Independence on July 4, 1776; this day is celebrated annually as Independence Day. In 1777, the Articles 
Title: United Kingdom–United States relations
Content:  remain as British subjects loyal to the king. When the Second Continental Congress convened in Philadelphia in May 1775, deliberations conducted by notable figures such as Benjamin Franklin, Thomas Jefferson, John Hancock, Samuel Adams, and John Adams resulted in a decision for full independence. Thus, the Declaration of Independence, unanimously ratified on 4 July 1776, was a radical and decisive break. The United States of America became the first colony in the world to successfully achieve independence in the modern era. According to R. R. Palmer the new American nation: In 1775, the Patriots established the Continental Army as a defense force. 
Title: Colonial history of the United States
Content:  servants, tradesmen, and a very few from the aristocracy. Settlers included the Dutch of New Netherland, the Swedes and Finns of New Sweden, the English Quakers of the Province of Pennsylvania, the English Puritans of New England, the English settlers of Jamestown, Virginia, the English Catholics and Protestant Nonconformists of the Province of Maryland, the "worthy poor" of the Province of Georgia, the Germans who settled the mid-Atlantic colonies, and the Ulster Scots of the Appalachian Mountains. These groups all became part of the United States when it gained its independence in 1776. Russian America and parts of New France and New Spain 
Title: Decolonization of the Americas
Content:  America, and parts of North America between 1810 and 1821 with the Mexican War of Independence. Independence was achieved in 1821 by a coalition uniting under Agustín de Iturbide and the Army of the Three Guarantees. Unity was maintained for a short period under the First Mexican Empire, but within a decade the region fought against the United States over the border lands (losing bordering lands of California and Texas). Most of the heat was during the official Mexican-American War from 1846 to 1848. In 1898, in the Greater Antilles, the United States won the Spanish–American War and occupied Cuba and Puerto Rico, ending Spanish territorial control in the Americas.
Title: Late modern period
Content:  war of independence. While the states had already rejected the governance of Parliament, through the Declaration the new United States now rejected the legitimacy of the monarchy to demand allegiance. The war raged for seven years, with effective American victory, followed by formal British abandonment of any claim to the United States with the Treaty of Paris. The Philadelphia Convention set up the current United States; the United States Constitution ratification the following year made the states part of a single republic with a limited central government. The Bill of Rights, comprising ten constitutional amendments guaranteeing many fundamental civil rights and freedoms, was ratified in 1791.
Title: Americas
Content:  last violent episode of decolonization was the Cuban War of Independence which became the Spanish–American War, which resulted in the independence of Cuba in 1898, and the transfer of sovereignty over Puerto Rico from Spain to the United States. Peaceful decolonization began with the purchase by the United States of Louisiana from France in 1803, Florida from Spain in 1819, of Alaska from Russia in 1867, and the Danish West Indies from Denmark in 1916. Canada became independent of the United Kingdom, starting with the Balfour Declaration of 1926, Statute of Westminster 1931, and ending with the patriation of the Canadian Constitution in 1982. The Dominion of Newfoundland similarly 

Question: who did the united states win its independence from?
Answer: the British Empire.
Great Britain.