The Blackfeet Treaty of 1855 was one of the most important treaties affecting Native nations in what is now Montana and the northern Rocky Mountain region. Also known as the Lame Bull Treaty or Judith River Treaty, it involved the United States, the Blackfoot Nation, and several other Native peoples whose lands, hunting grounds, and political futures were being reshaped by U.S. expansion.
This treaty was not simply a legal document. It was part of a larger struggle over land, movement, trade, transportation routes, military power, and Native sovereignty. To understand it, students need to look at what the treaty said, who was involved, why the United States wanted it, and how later events reduced Native control over lands that treaty language appeared to recognize.
Key Facts About the Blackfeet Treaty of 1855
- Formal name: Treaty with the Blackfeet, 1855
- Other names: Blackfeet Treaty of 1855, Lame Bull Treaty, Judith River Treaty
- Date signed: October 17, 1855
- Ratified: April 15, 1856
- Proclaimed: April 25, 1856
- Location: Council ground on the Upper Missouri near the mouth of the Judith River
- U.S. commissioners: A. Cumming and Isaac I. Stevens
- Main themes: Peace, territory, hunting rights, roads, annuities, U.S. expansion, and Native sovereignty
What Was the Blackfeet Treaty of 1855?
The Blackfeet Treaty of 1855 was an agreement between U.S. representatives and Native leaders in the northern Plains and Rocky Mountain region. It was negotiated at a council ground on the Upper Missouri River near the mouth of the Judith River.
The treaty tried to define relations between the United States and several Native nations. It addressed peace among Native groups and with the United States, recognized Blackfoot territory, created a common hunting ground, allowed U.S. roads and military posts, and promised payments and support from the federal government.
Like many 19th-century U.S.-Native treaties, it must be read carefully. The words on the page do not tell the full story. Native leaders and U.S. officials often approached treaty-making with very different assumptions about land, ownership, sovereignty, and political authority.
Who Was Involved in the Treaty?
The treaty was made with the Blackfoot Nation and other Native peoples in the region. The treaty text refers to the Blackfoot Nation and also includes other groups whose hunting grounds, movements, and relations were tied to the agreement.
In many treaty records, the Blackfoot or Blackfeet name is used broadly. Today, “Blackfeet” often refers to the federally recognized Blackfeet Tribe of the Blackfeet Indian Reservation in Montana, while “Blackfoot” can also refer to the larger Blackfoot Confederacy, including related peoples across the U.S.-Canada border.
Other Native peoples connected to the treaty included the Gros Ventre, Flathead, Upper Pend d’Oreille, Kootenai, and Nez Perce. The treaty was not just about one people in isolation. It involved a region where Native nations hunted, traded, fought, intermarried, negotiated, and moved across large landscapes.
Where and When Was the Treaty Signed?
The treaty was signed on October 17, 1855, on the Upper Missouri near the mouth of the Judith River. At the time, this area was described in the treaty as part of Nebraska Territory. Today, the location is associated with central Montana.
The treaty was later ratified by the U.S. Senate on April 15, 1856, and proclaimed on April 25, 1856. Those dates matter because, under U.S. law, ratification and proclamation made the agreement part of the formal treaty record.
For Native nations, however, treaty meaning was not only about U.S. legal procedure. It was also about what leaders understood they were agreeing to, what promises were made in council, and how the United States behaved afterward.
Blackfoot Territory and the Common Hunting Ground
One of the most important parts of the treaty dealt with land. The treaty described territory associated with the Blackfoot Nation and also created a common hunting ground where several Native nations could hunt, fish, gather fruit, graze animals, cure meat, and dress robes.
The common hunting ground was supposed to last for ninety-nine years. This is a key detail because it shows that the treaty did not simply divide land into fixed private property in the way U.S. officials often imagined. Hunting, movement, and shared use remained central to the region’s Native economies and lifeways.
At the same time, the treaty language also reflected U.S. efforts to map, label, and control Native territory. By naming boundaries, defining areas, and attaching legal terms to land, U.S. officials were making Native homelands easier to manage, cross, and eventually reduce.
Roads, Telegraph Lines, and Military Posts
The treaty gave the United States important rights of passage and construction. It allowed the federal government to build roads, telegraph lines, military posts, agencies, mission buildings, and other facilities.
This was one reason the treaty mattered so much to the United States. In the 1850s, U.S. leaders wanted to expand transportation and communication across the West. Roads and telegraph lines were not neutral projects. They helped settlers, soldiers, traders, government agents, and future development move through Native lands.
For Native nations, these provisions could become dangerous. A road might begin as a travel route, but it could later bring settlers, military pressure, resource extraction, and more demands for land.
Annuities and Federal Promises
The treaty promised annuities and support from the United States. Annuities were payments or goods that the federal government agreed to provide over time. These might include money, supplies, agricultural tools, livestock, education support, or other assistance.
Such promises were common in U.S.-Native treaties. They were often presented as compensation for land access, peace agreements, or changes in Native life. But federal promises were not always delivered fully, fairly, or on time.
For Native nations, treaty annuities could become a source of dependence when older economies were disrupted by disease, military pressure, settler expansion, and the decline of buffalo. This made federal control stronger even when treaty language sounded cooperative.
Education, Agriculture, and Assimilation
The treaty included provisions connected to education and agriculture. U.S. officials often treated these programs as “civilizing” policies. Their goal was not only to provide practical support. They were also meant to push Native people toward farming, schooling, Christianity, and social systems preferred by the United States.
This matters because treaty promises were tied to assimilation. Assimilation meant pressuring Native peoples to abandon their own political systems, spiritual traditions, languages, land use patterns, and economies in favor of Euro-American norms.
Native nations did not all respond to these pressures in the same way. Some leaders accepted certain forms of support while trying to protect their people. Others resisted federal influence. In either case, education and agriculture policies were part of a larger attempt to transform Native life.
Why the Treaty Was Important to the United States
The United States wanted the 1855 treaty for several reasons. It wanted peace between Native nations and with U.S. citizens. It wanted safer routes for travel, trade, and military movement. It wanted to reduce conflict in a region important to westward expansion.
The treaty also helped U.S. officials claim greater authority over a large region. By negotiating boundaries, roads, agencies, and annuities, the government could present itself as the power responsible for managing Native affairs.
That was a major shift. Native nations had their own governments, diplomacy, laws, and territorial relationships. The treaty process increasingly placed those relationships inside a U.S. legal framework.
Why the Treaty Was Important to Native Nations
For Native nations, the treaty had different meanings. Leaders may have sought peace, protection of hunting grounds, recognition of territory, access to trade goods, and ways to manage conflict with neighboring groups and U.S. expansion.
Treaty councils were often places of translation, negotiation, pressure, misunderstanding, and strategic decision-making. Native leaders were not passive. They made choices in difficult conditions, often trying to protect their people from greater harm.
Still, the treaty was made in an unequal setting. The United States had growing military, political, and settler power. Native nations faced disease, trade disruption, changing buffalo patterns, intertribal conflict, and expanding outside pressure. These conditions shaped what was possible.
Problems With Treaty-Making and Interpretation
One of the biggest problems with U.S.-Native treaty history is interpretation. U.S. officials often treated treaties as land cession tools, legal boundary documents, or steps toward federal control. Native leaders often understood agreements through diplomacy, shared use, kinship, peace, and continuing sovereignty.
Language also mattered. Treaty councils involved translation across different languages and legal traditions. Words such as “territory,” “control,” “hunting ground,” “protection,” and “peace” could carry different meanings depending on who was speaking and who was recording.
Written treaty texts were usually produced by U.S. officials. That means the final document often reflects U.S. legal priorities more than Native oral understandings of the agreement.
Long-Term Impact of the 1855 Treaty
The Blackfeet Treaty of 1855 did not permanently protect Native land from reduction. Later treaties, executive orders, agreements, and federal actions reduced Native land bases in Montana and the surrounding region.
The Montana History Portal notes that later treaties and executive orders between 1873 and 1895 reduced the size of the Blackfeet Reservation several times. This pattern was common across Native treaty history: an agreement might appear to recognize territory, but later federal actions could shrink or alter that land base.
The treaty also mattered because it connected Native homelands to U.S. infrastructure. Roads, posts, agencies, and government presence helped expand federal power. Over time, that power was used to pressure Native nations onto smaller reservations and toward assimilation policies.
Why the Blackfeet Treaty of 1855 Still Matters
The Blackfeet Treaty of 1855 still matters because treaties are not just old documents. They are part of the legal and political relationship between Native nations and the United States.
Treaties show that Native nations were recognized as political communities capable of making agreements with the federal government. That recognition is central to tribal sovereignty today.
The treaty also reminds students that westward expansion was not simply a story of settlers moving into empty land. The northern Plains and Rocky Mountain region was already home to Native nations with governments, territories, economies, and rights. The treaty process reshaped those rights, often in ways that favored U.S. expansion.
Quick Timeline of the Blackfeet Treaty of 1855
- 1851: The Fort Laramie Treaty recognizes broad Native territories on the Plains, including Blackfoot territory.
- October 17, 1855: The Blackfeet Treaty is signed near the mouth of the Judith River on the Upper Missouri.
- April 15, 1856: The treaty is ratified by the U.S. Senate.
- April 25, 1856: The treaty is officially proclaimed.
- 1850s–1860s: U.S. roads, military movement, and settlement pressure increase across the West.
- 1873–1895: Later federal actions reduce Blackfeet land holdings and reshape reservation boundaries.
- Modern era: The treaty remains part of the historical and legal background of Blackfeet sovereignty and land rights.
Key Terms
Blackfeet Treaty of 1855: A treaty between the United States, the Blackfoot Nation, and other Native peoples, signed near the Judith River in 1855.
Lame Bull Treaty: Another name often used for the Blackfeet Treaty of 1855.
Judith River Treaty: A name connected to the treaty’s signing location near the mouth of the Judith River.
Blackfoot Nation: The treaty term used for the Blackfoot people, including groups connected to the Blackfoot Confederacy.
Common hunting ground: A treaty-defined area where several Native nations were promised shared hunting, fishing, gathering, grazing, and related rights.
Annuities: Payments or goods promised by the United States to Native nations under treaty agreements.
Assimilation: A policy goal that pressured Native peoples to adopt Euro-American farming, schooling, religion, and social systems.
Tribal sovereignty: The inherent authority of Native nations to govern themselves and maintain political relationships with other governments.
Ratification: The formal approval process by which the U.S. government made a treaty legally binding under U.S. law.