US Territory

Oklahoma

Eastern Oklahoma (the main body of the state) was acquired by the United States in the Louisiana Purchase of 1803. Its general borders as Indian Territory were established by the Nonintercourse Act of 1834, and the region served as the destination for relocated Native American nations under the federal policy of Indian removal. After the Civil War, tribes including the Cherokee, Choctaw, Chickasaw, Creek, and Seminole held territorial authority here. In 1889, the Unassigned Lands were opened for settlement in the Oklahoma Land Rush. Following the 1890 Oklahoma Organic Act, this eastern half remained unorganized Indian Territory while the western half became organized Oklahoma Territory. The 1906 Oklahoma Enabling Act merged both territories, and Oklahoma was admitted as the 46th state on November 16, 1907.

Admission date
November 16, 1907
Historic sites
1,437
Military engagements
331

Pre-contact era

The region was home to various Native American peoples who held original Indian title to their land as independent nations. After the American Civil War (1861–1865), displaced Eastern American tribes including the Cherokee, Choctaw, Chickasaw, Creek, Seminole, and others were relocated here under U.S. federal policy.

Colonial history

La Salle claimed Mississippi basin 1682; eastern Oklahoma part of Louisiana.

France ceded Louisiana to Spain 1762.

Spain retroceded Louisiana to France 1800.

Louisiana Purchase 1803; designated Indian Territory; statehood 1907.

Territorial period

From 1890 to 1907, after the 1890 Oklahoma Organic Act organized the western half into Oklahoma Territory, the eastern half continued as unorganized Indian Territory. It comprised the territorial holdings of the Cherokee, Choctaw, Chickasaw, Creek, Seminole, and other displaced Eastern American tribes. The 1906 Oklahoma Enabling Act combined Oklahoma Territory and Indian Territory into the single state of Oklahoma, formally incorporating the tribes and residents into the United States.

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Overview
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The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Regional histories

Eastern Oklahoma Indian Territory
›
Oklahoma Panhandle No Mans Land
›

Explore Oklahoma records

1,437
National Register historic sites
National Register listings ›
331
Military engagements
Military history records ›
55
Indigenous groups
Heritage records ›
8
Notable figures
Born in Oklahoma ›
18
Colonial-era events
1492 to early statehood ›
1
Archaeological sites
Prehistoric sites ›
Oklahoma counties
Census population history ›
Sources

State history content adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License. Historic sites data: National Register of Historic Places, National Park Service (public domain).

About Oklahoma

When did Oklahoma become a state?
Oklahoma is a US territory, not a state.
What European powers colonized Oklahoma?
The territory that became Oklahoma passed through several colonial periods. La Salle claimed Mississippi basin 1682; eastern Oklahoma part of Louisiana. France ceded Louisiana to Spain 1762. Spain retroceded Louisiana to France 1800. Louisiana Purchase 1803; designated Indian Territory; statehood 1907.
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