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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)
1950 was a watershed year for many cities in the United States. Many cities in the country peaked in population, but started a slow decline caused by suburbanization associated with pollution, congestion, and increased crime rates in inner cities , while the improved infrastructure of the Eisenhower Interstate System more easily facilitated car ...
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.
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)
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 .
This page was last edited on 21 December 2023, at 03:26 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
This page was last edited on 14 October 2023, at 19:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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.