The years between the end of the Civil War, in 1865, and the end of the century witnessed rapid and far-reaching change in the economic and social life of the...
In the summer of 1876, two dramatically different places captured the American nation’s attention. As the summer began, fairgoers in Philadelphia teemed into the Centennial Exhibition held to commemorate...
Spanish explorer Vasco Nuñez de Balboa crossed the Isthmus of Panama and became the first European to cross the American landmass to reach the Pacific Ocean.
Meriwether Lewis and William Clark explored the territories gained through the Louisiana Purchase. The Corps of Discovery set out from St. Louis and explored 8,000 miles along the Missouri and Columbia Rivers and reached the Pacific. The expedition returned in 1806.
The United States exploded a hydrogen bomb on Eniwetok, an island in the Pacific Ocean. The detonation destroyed the island in a three-mile wide mushroom cloud. The successful test marked a new era in the arms race.