
1914–1919
World War I
American involvement in World War I expanded the country’s military, economic, and diplomatic role in the world.
Defining Moments
Key Historical Events
Historical events for this era are still being added. Check back soon.
Historic Places
Explore Destinations From This Era

Arkansas State Capitol
Little Rock, AR
Arkansas's working statehouse is a grand early-20th-century neoclassical landmark where visitors can explore the architecture, history, and ongoing work of state government.
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Borderland State Park and Ames Mansion
North Easton, MA
A former Ames family country estate pairing an early-twentieth-century stone mansion with designed grounds, ponds, and miles of recreational trails.
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Brooklyn Navy Yard
Brooklyn, NY
A landmark New York shipyard where generations of workers built celebrated American warships and where historic industry continues within a modern manufacturing campus.
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Empire Mine State Historic Park
Grass Valley, CA
A preserved hard-rock mining complex where visitors can explore the industrial workings, elegant estate, and landscaped grounds of one of California’s richest gold mines.
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Fort DuPont State Park
Delaware City, DE
A Delaware River park preserving remnants of a military post that evolved from Civil War defenses into a major coastal-artillery installation used through World War II.
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Fort Morgan State Historic Site
Gulf Shores, AL
A massive masonry fortress guarding Mobile Bay that spans the War of 1812 aftermath, the Civil War, and America's later coastal-defense era.
View DetailsAbout This Era
American involvement in World War I expanded the country’s military, economic, and diplomatic role in the world.
Last updated August 2, 2026

