James K. Polk

Since 1823, when the Monroe Doctrine was first introduced to the world, the US has regarded Cuba as key to its designs for Latin America.

Signed February 2, 1848, the treaty compelled Mexico to cede 55 percent of its territory, bringing more than 525,000 square miles under US sovereignty.

Researchers combed through 19th-century records and found evidence of the species, which joined a menagerie that included Galapagos tortoises and kangaroos.

For more than a century, U.S. wars of invasion have claimed a humanitarian mantle.

On the roads and seas miners traveled to reach gold in the United States and Australia.

We ascribe too much meaning to the early years of the republic.

Joe Biden has met with scholars to discuss his presidency and likely legacy—but what are we to make of his special relationship with historian Jon Meacham?

The answer can change over time.

The idea that justices exist outside of politics is a relatively new concept.

Most recent scholarship, while supporting the view that the policy was vicious, has not addressed the question of genocide.

How John and Jessie Frémont explored the frontiers of legend-making.

Anti-Catholic sentiment in the States gave men like John Riley little reason to continue to pay allegiance to the stars and stripes.

There isn’t any rule against tobacco spitting on the House floor, but there is one against wearing a hat.

Since the Mexican-American War, Army regulars haven't always been treated as heroes.

The crazy history of nominating Conventions.

The longest-running party in America has seen significant shifts in its ideological and geographic makeup.

Who were Washington, Adams, Jefferson, Lincoln, and the rest of the first 16 US presidents, what did they do, and what do they hope history has forgotten?