Established U.S. sovereignty over Puget Sound lands while defining tribal rights and relations for nine Native American tribes in Washington Territory.
Key Facts
- Date Signed
- December 26, 1854
- Number of Tribes
- 9 tribes and bands
- U.S. Signatory
- Isaac I. Stevens, Governor of Washington Territory
- Region Covered
- Lands around the head of Puget Sound and adjacent inlets
- Tribal Signatories
- Nisqually, Puyallup, Steilacoom, Squaxin Island, and others
Location
Cause → Event → Consequence
As the United States expanded westward, Washington Territory required formal legal arrangements to extinguish Native American land titles around Puget Sound. Governor Isaac Stevens was tasked with negotiating treaties with regional tribes to open land for settlement while establishing defined rights for indigenous peoples.
On December 26, 1854, Isaac I. Stevens signed the Treaty of Medicine Creek with chiefs, headmen, and delegates of nine tribes and bands—Nisqually, Puyallup, Steilacoom, Squaxin Island, and others—treating them collectively as one nation for treaty purposes around the head of Puget Sound in Washington Territory.
The treaty formalized U.S. authority over Puget Sound lands and created a legal framework governing relations between the federal government and the nine signatory tribes. It set precedents for subsequent Pacific Northwest treaties and became a source of ongoing legal disputes, particularly regarding Native fishing rights in the region.
Political Outcome
Nine tribes ceded lands around Puget Sound to the United States while retaining certain rights; tribes were treated collectively as one nation for treaty purposes.
Tribal nations held customary sovereignty over lands around Puget Sound
United States assumed formal sovereignty; tribes retained defined rights under treaty