20th Century United States History

The 20th century in the United States refers to the period in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

from 1901 through 2000 in the

Gregorian calendar The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years dif ...

. For information on this period, see: *

History of the United States The history of the lands that became the United States began with the arrival of Settlement of the Americas, the first people in the Americas around 15,000 BC. Native American cultures in the United States, Numerous indigenous cultures formed ...

series: **

History of the United States (1865–1918) The history of the United States from 1865 until 1918 covers the Reconstruction Era, the Gilded Age, and the Progressive Era, and includes the rise of industrialization and the resulting surge of immigration in the United States. This article foc ...

History of the United States (1918–1945) In the history of the United States, the period from 1918 through 1945 covers the post-World War I era, the Great Depression, and World War II. After World War I, the U.S. rejected the Treaty of Versailles and did not join the League of Nations. ...

History of the United States (1945–1964) For the United States, 1945–1964 was a time of high economic growth and general prosperity. It was also a time of confrontation as the capitalist United States and its allies politically opposed the Soviet Union and other communist states; the ...

History of the United States (1964–1980) The history of the United States from 1964 through 1980 includes the climax and end of the Civil Rights Movement; the escalation and ending of the Vietnam War; the drama of a generational revolt with its sexual freedoms and use of drugs; and the ...

History of the United States (1980–1991) The history of the United States from 1980 until 1991 includes the last year of the Jimmy Carter presidency, eight years of the Ronald Reagan administration, and the first three years of the George H. W. Bush presidency, up to the collapse of the ...

History of the United States (1991–2008) The history of the United States from 1991 to 2008 began after the dissolution of the Soviet Union. The dissolution signaled the end of the Cold War and left the U.S. unchallenged as the world's sole superpower. The U.S. took a leading role i ...

* Historical eras: **

Progressive Era The Progressive Era (late 1890s – late 1910s) was a period of widespread social activism and political reform across the United States focused on defeating corruption, monopoly, waste and inefficiency. The main themes ended during Am ...

United States in World War I The United States declared war on the German Empire on April 6, 1917, nearly three years after World War I started. A ceasefire and Armistice was declared on November 11, 1918. Before entering the war, the U.S. had remained neutral, though it ...

Roaring Twenties The Roaring Twenties, sometimes stylized as Roaring '20s, refers to the 1920s decade in music and fashion, as it happened in Western society and Western culture. It was a period of economic prosperity with a distinctive cultural edge in the U ...

Great Depression in the United States In the United States, the Great Depression began with the Wall Street Crash of October 1929 and then spread worldwide. The nadir came in 1931–1933, and recovery came in 1940. The stock market crash marked the beginning of a decade of high un ...

United States in World War II The United States participated in World War II in different ways: *United States home front during World War II *Military history of the United States during World War II See also *United States non-interventionism before entering World War II Un ...

Cold War The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because the ...

Civil rights era The civil rights movement was a nonviolent social and political movement and campaign from 1954 to 1968 in the United States to abolish legalized institutional racial segregation, discrimination, and disenfranchisement throughout the United S ...

** Reagan era {{DEFAULTSORT:20th Century In The United States