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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)
20th-century architecture in the United States (20 C, 13 P) African-American history between emancipation and the civil rights movement (6 C, 194 P) American frontier (53 C, 313 P, 1 F)
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.
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Pages in category "Years of the 20th century in the United States" The following 100 pages are in this category, out of 100 total. This list may not reflect recent changes .
The 20th century began on 1 January 1901 (MCMI), and ended on 31 December 2000 (MM). [1] [2] It was the 10th and last century of the 2nd millennium and was marked by new models of scientific understanding, unprecedented scopes of warfare, new modes of communication that would operate at nearly instant speeds, and new forms of art and entertainment.
The United States became the world's leading industrial power in the 20th century, largely due to entrepreneurship, industrialization, and the arrival of millions of immigrant workers. A national railroad network was completed, and large-scale mines and factories were established.
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