Title: Territorial evolution of the United States
Content:  The United States of America was created on July 4, 1776, with the Declaration of Independence of thirteen British colonies in North America. In the Lee Resolution of July 2, 1776, the colonies resolved that they were free and independent states. The union was formalized in the Articles of Confederation, which came into force on March 1, 1781, after being ratified by all 13 states. Their independence was recognized by Great Britain in the Treaty of Paris of 1783, which concluded the American Revolutionary War. This effectively doubled the size of the colonies, now able to stretch west past the Proclamation Line to 
Title: History of the United States (1789–1849)
Content:  After the War of 1812, the United States began to assert a newfound sense of nationalism. America began to rally around national heroes like Andrew Jackson. Patriotic feelings were aroused by Francis Scott Key's poem The Star-Spangled Banner. Under the direction of Chief Justice John Marshall, the Supreme Court issued a series of opinions reinforcing the role of the national government. These decisions included McCulloch v. Maryland and Gibbons v. Ogden, both of which reaffirmed the supremacy of the national government over the states. The signing of the Adams-Onis Treaty helped settle the western border of the country through popular and peaceable means.
Title: History of the United States
Content:   The history of the United States began with the arrival of Native Americans in North America around 15,000 BC. Numerous indigenous cultures formed, and many disappeared in the 16th century. The arrival of Christopher Columbus in 1492 started the European colonization of the Americas. Most colonies were formed after 1600, and the United States was the first nation whose most distant origins are fully recorded. By the 1760s, the thirteen British colonies contained 2.5 million people and were established along the Atlantic Coast east of the Appalachian Mountains. After defeating France, the British government imposed a series of taxes, including the Stamp Act of 1765, rejecting the colonists' constitutional argument 
Title: United States
Content:  capital is Washington, D.C., and the most populous city is New York City. Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago, and European colonization began in the 16th century. The United States emerged from the thirteen British colonies established along the East Coast. Disputes with Great Britain over taxation and political representation led to the American Revolutionary War (1775–1783), which established the nation's independence. In the late 18th century, the U.S. began expanding across North America, gradually obtaining new territories, sometimes through war, frequently displacing Native Americans, and admitting new states; by 1848, the United States spanned the continent. Slavery was legal in 
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: American nationalism
Content:  full American citizens. Frequent parades along with new rituals and ceremonies—and a new flag—provided popular occasions for expressing a spirit of American nationalism. The new nation operated under the very weak national government set up by the Articles of Confederation and most Americans put loyalty to their state ahead of loyalty to the nation. Nationalists led by George Washington, Alexander Hamilton and James Madison had Congress call a constitutional convention in 1787. It produced the Constitution for a strong national government which was debated in every state and unanimously adopted. It went into effect in 1789 as the first modern constitutional liberal democracy based on the consent of the governed,  with Washington as the 
Title: 1776 in the United States
Content:  Events from the year 1776 in the United States. This year is celebrated in the United States as the official beginning of the nation, with the Declaration of Independence issued on July 4.
Title: List of U.S. states by date of admission to the Union
Content:  The Second Continental Congress approved the Articles of Confederation for ratification by the individual states on November 15, 1777. The Articles of Confederation came into force on March 1, 1781, after being ratified by all 13 states. On March 4, 1789, the general government under the Articles was replaced with the federal government under the present Constitution.
Title: U.S. state
Content:  The 13 original states came into existence in July 1776 during the American Revolutionary War (1775–1783), as the successors of the Thirteen Colonies, upon agreeing to the Lee Resolution and signing the United States Declaration of Independence. Prior to these events each state had been a British colony; each then joined the first Union of states between 1777 and 1781, upon ratifying the Articles of Confederation, the first U.S. constitution. Also during this period, the newly independent states developed their own individual state constitutions, among the earliest written constitutions in the world. Although different in detail, these state constitutions shared features that would be important in the American constitutional order: they were republican in form, and separated power among three branches, most had bicameral legislatures, and contained statements of, or a bill of rights. Later, from 1787 to 1790, each of the states also ratified a new federal frame of government in the Constitution of the United States. In relation to the states, the U.S. Constitution elaborated concepts of federalism.

Question: when did the united states became a nation?
Answer: 1776.
July 4, 1776.
In 1776.