Omaha is the most populous city in the U.S. state of Nebraska and the county seat of Douglas County. It is located in the Midwestern United States along the Missouri River, about 10 mi (15 km) north of the mouth of the Platte River. As the nation’s 40th-most populous city, Omaha had a population of 486,051 as of the 2020 census.

Various Native American tribes had lived in the land that became Omaha since the 17th century, including the Omaha and Ponca, Dhegihan-Siouan language people who had originated in the lower Ohio River valley and migrated west by the early 17th century; Pawnee, Otoe, Missouri, and Ioway. The word Omaha (actually Umoⁿhoⁿ or Umaⁿhaⁿ) in the Omaha language means “Upstream People” or “Against the Current.”

In 1804, the Lewis and Clark Expedition passed the riverbanks where the city of Omaha would be built. Between July 30 and August 3, 1804, members of the expedition, including Meriwether Lewis and William Clark, met with Oto and Missouria tribal leaders at the Council Bluff at a point about 20 mi (32 km) north of present-day Omaha.