Before American concepts of race took hold in the newly-acquired Louisiana, early 19th-century New Orleans had large population of free people of color.
One of the National Park Service's first historic preservation projects, the Colonial National Monument, wrote people of color completely out of the story.
Love was a deciding factor in the expansion of Asian immigration to the United States, via laws that emerged from Congress in the 1960s.
Historians traditionally point to economic and social conditions as the primary causes for the Great Migration, but racist hate crimes played a role as well.
FDR's "czar of research," an electrical engineer named Vannevar Bush, was working on an atomic bomb months before Pearl Harbor.
Historians are giving credence to W.E.B. DuBois's assertion that enslaved workers coordinated a general strike, which helped end the Civil War.
After triumphantly leading the Lewis and Clark expedition, Meriwether Lewis was either murdered or committed suicide. Did syphilis play a role?
Richard E. Byrd's 1928-1930 Antarctica Expedition was sponsored by mass media. Was it all about science and exploration -- or about Byrd's personal #brand?
Early 20th century National Park Service Rangers were a notoriously rough-and-tumble lot.
The United States National Weather Service began as part of the military, with a mandate to serve the interests of federal officials and business owners.