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The 13 British North American provinces of Virginia, Massachusetts Bay, Maryland, Connecticut, Rhode Island and Providence Plantations, New York, New Jersey, New Hampshire, Pennsylvania and Delaware, South Carolina, North Carolina, and Georgia united as the United States of America declare their independence from the Kingdom of Great Britain on ...
The United States government faced a major challenge from the nullification crisis in 1832. The Tariff of 1832 was passed, and while it was a reduction of the controversial Tariff of 1828, its passage still resulted in conflict.
November 1: The United States successfully detonates the first hydrogen bomb, codenamed "Ivy Mike", at Eniwetok Atoll in the Marshall Islands in the central Pacific Ocean, with a yield of 10.4 megatons. Development of the first effective polio vaccine by Jonas Salk. The Mau Mau Uprising begins in Kenya. The Slansky Trial in Czechoslovakia.
The 20th century in the United States refers to the period in the United States from 1901 through 2000 in the Gregorian calendar. For information on this period, see: History of the United States series: History of the United States (1865–1918) History of the United States (1918–1945) History of the United States (1945–1964)
For the remainder of the 20th century, the United States emerged as the world's sole remaining superpower and continued to intervene in international affairs during the 1990s. [266] The Gulf War against Iraq started during George H. W. Bush's administration. [266] The war started when Iraq invaded neighboring Kuwait in 1990.
This is a list of military conflicts, that United States has been involved in. There are currently 123 military conflicts on this list, 5 of which are ongoing. These include major conflicts like the American Revolutionary War, the War of 1812, the Mexican–American War, the American Civil War, the Spanish-American War, World War I, World War II and the Gulf War.
Teddy Roosevelt, the Bull Moose, led American progressives in the early 20th century. 1906 – San Francisco earthquake; 1907 – Oklahoma becomes a state; 1907 – Gentlemen's Agreement; 1907 – Coal mine explodes in Monongah, West Virginia, killing at least 361. Worst industrial accident in American history. 1908 – Ford Model T appears on ...
Since the 19th century, the United States government has participated and interfered, both overtly and covertly, in the replacement of many foreign governments. In the latter half of the 19th century, the U.S. government initiated actions for regime change mainly in Latin America and the southwest Pacific, including the Spanish–American and Philippine–American wars.