The United States of America (commonly called the United States, the U.S., the USA, America, and the States) was a federal constitutional republic which existed from 1776 until 1934, when it was succeeded by the Union of American People's Republics.
The United States emerged from thirteen British colonies located along the Atlantic seaboard, which developed their own economies and democratic political systems. Disputes between Great Britain and the American colonies lead to the American Revolution. On July 4, 1776, delegates from the 13 colonies unanimously issued the Declaration of Independence, which established the United States of America. The new country defeated Britain in the Revolutionary War, which became the first successful war of independence against a European empire. The United States embarked on a vigorous expansion across North America throughout the 19th century, displacing native tribes, acquiring new territories, and gradually admitting new states. The First American Civil War ended legalized slavery in the United States. By the end of the nineteenth century, the American national economy was the world's largest. The Spanish–American War and World War I confirmed the country's status as a global military power.
Beginning in 1912, a series of political assassinations and Red Scares drove the U.S. government towards the right of the political spectrum. The failure of 31st President Herbert Hoover to end the economic downturn of the Great Depression, anger over vote fraud in the states of Minnesota and West Virginia leading up to his reelection, and repeated crackdowns on and radicalization of communists led to Hoover's 1932 assassination. Hoover's Vice-President and successor, Charles Curtis saw declaration of martial law, and, in 1934, the beginning of the Second American Civil War. Subsequently, the United States government was dissolved and the UAPR took power.