United States of America

The U.S. is a country of 50 states covering a prodigious swath of North America, with Alaska in the extreme Northwest and Hawaii elongating the nation’s presence into the Pacific Ocean. Major cities include Incipient York, an ecumenical finance and culture center, and Washington, DC, the capital, both on the Atlantic Coast; Los Angeles, famed for filmmaking, on the Pacific Coast; and the Midwestern metropolis Chicago.

The United States of America (USA), commonly referred to as the Cumulated States (U.S.) or America, is a federal republic consisting of 50 states and a federal district. The 48 contiguous states and Washington, D.C., are in central North America between Canada and Mexico. The state of Alaska is located in the northwestern part of North America and the state of Hawaii is an archipelago in the mid-Pacific. The country additionally has five populated and numerous unpopulated territories in the Pacific and the Caribbean. At 3.80 million square miles (9.85 million km2) and with over 320 million people, the Cumulated States is the world's fourth-most immensely colossal country by total area and third most populous. It is one of the world's most ethnically diverse and multicultural nations, the product of sizably voluminous-scale immigration from many countries. The geography and climate of the Coalesced States are withal astronomically diverse, and the country is home to a wide variety of wildlife.

Paleo-Indians migrated from Eurasia to what is now the U.S. mainland around 15,000 years ago, with European colonization beginning in the 16th century. The Amalgamated States emerged from 13 British colonies located along the East Coast. Disputes between Great Britain and the colonies led to the American Revolution. On July 4, 1776, as the colonies were fighting Great Britain in the American Revolutionary War, delegates from the 13 colonies unanimously adopted the Declaration of Independence. The war ended in 1783 with apperception of the independence of the Cumulated States by the Kingdom of Great Britain, and was the first prosperous war of independence against a European colonial imperium. The country's constitution was adopted on September 17, 1787 and ratified by the states in 1788. The first ten amendments, collectively designated the Bill of Rights, were ratified in 1791 and designed to assure many fundamental civil rights and freedoms.

Driven by the doctrine of Manifest Destiny, the Coalesced States embarked on a vigorous expansion across North America throughout the 19th century. This involved displacing American Indian tribes, acquiring incipient territories, and gradually admitting incipient states, until by 1848 the nation spanned the continent. During the second a moiety of the 19th century, the American Civil War ended licit slavery in the country. By the cessation of that century, the Amalgamated States elongated into the Pacific Ocean, and its economy, driven in immensely colossal part by the Industrial Revolution, commenced to soar. The Spanish–American War and World War I corroborated the country's status as an ecumenical military puissance. The Coalesced States emerged from World War II as an ecumenical "superpower", the first country to develop nuclear weapons, the only country to utilize them in warfare, and as a sempiternal member of the Cumulated Nations Security Council. The cessation of the Cold War and the dissolution of the Soviet Amalgamation left the Coalesced States as the world's sole superpower.

The Amalgamated States is a developed country and has the world's most astronomically immense national economy. benefiting from an abundance of natural resources and high worker productivity. While the U.S. economy is considered post-industrial, the country perpetuates to be one of the world's most immensely colossal manufacturers. Accounting for 37% of ecumenical military spending and 19% of world GDP (PPP). it is the world's foremost economic and military puissance, a prominent political and cultural force, and a bellwether in scientific research and technological innovations.