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Industrialization and Progressivism (1877-1920)
Ignited by post-Civil War demand and fueled by technological advancements, large-scale industrialization began in the United States during the late 1800s. Growing industries enticed foreign immigration, fostered urbanization, gave rise to the American labor movement and developed the infrastructure that facilitated the settling of the West. A period of progressive reform emerged in response to political corruption and practices of big business. -
Foreign Affair from Imperialism to Post WWI (1898-1930)
The industrial and territorial growth of the United States fostered expansion overseas. Greater involvement in the world set the stage for American participation in World War I and attempts to preserve post-war peace. -
Prosperity, Depression, and the New Deal (1919-1941)
The Post-World War I period was characterized by economic, social and political turmoil. Post-war prosperity brought about changes to American popular culture. However, economic disruptions growing out the war years led to worldwide depression. The United States attempted to deal with the Great Depression through economic programs created by the federal government. -
From Isolationism to World War (1930-1945)
The isolationist approach to foreign policy meant U.S. leadership in world affairs diminished after World War I. Overseas, certain nations saw the growth of tyrannical governments that reasserted their power through aggression and created conditions leading to the Second World War. After Pearl Harbor, the United States entered World War II, which changed the country’s focus from isolationism to international involvement -
The Cold War (1945-1991)
a sustained state of political and military tension between powers in the Western Bloc (the United States with NATO and others) and powers in the Eastern Bloc (the Soviet Union and its allies in Warsaw Pact). Historians have not fully agreed on the dates, but 1947–1991 is common. -
Social Transformation in the United States (1945-1994)
Social Transformations in the United States (1945-1994)
A period of post-war prosperity allowed the United States to undergo fundamental social change. Adding to this change was an emphasis on scientific inquiry, the shift from an industrial to a technological/service economy, the impact of mass media, the phenomenon of suburban and Sun Belt migrations, and the expansion of civil rights. -
United States and the Post-Cold War World (1991 to present)
The military history of the United States spans a period of over two centuries. During those years, the United States evolved from a new nation fighting Great Britain for independence (1774–1781), through the monumental American Civil War (1861–65) to the world's sole remaining superpower of the late 20th century and early 21st century.
