All treaties and agreements

Great Lakes / Old NorthwestTreaty

Black Hawk Purchase (Treaty of Fort Armstrong), 1832

After the Black Hawk War, the Sac and Fox ceded a Mississippi frontier tract in 1832, keeping 400 square miles, for annuities.

Signed
September 21, 1832
Senate
Ratified February 13, 1833
Land given up
about 5.4 million acres
Land set aside for the nations
about 276,000 acres
The land in this treaty’s record. Open on the map

What happened

What happened

On September 21, 1832, Major General Winfield Scott and Illinois Governor John Reynolds signed a treaty of peace, friendship and cession at Fort Armstrong, Rock Island, Illinois. The other party was the confederated tribes of Sac and Fox, represented in general council. The treaty text does not use the name Black Hawk Purchase.

The preamble says "a formidable band" of the Sac and Fox nation had left their country in April and begun "an unprovoked war" on citizens of the United States. It says the United States had "subdued the said hostile band." The United States then demanded, "partly as indemnity for the expense incurred, and partly to secure the future safety and tranquillity of the invaded frontier," a cession "more than proportional to the numbers of the hostile band."

Article 1 ceded a tract along the Mississippi, described by boundaries but with no stated acreage. Article 2 reserved 400 square miles for the tribes, around Keokuck's principal village on the Ioway River. The United States agreed to pay $20,000 a year in specie for thirty years, to maintain a smith's shop, and to pay the traders Farnham and Davenport $40,000 for debts the tribes had acknowledged.

Article 7 says Black Hawk, his sons, the Prophet and others would be held as hostages "for the future good conduct of the late hostile bands." The Statutes at Large record a proclamation on February 13, 1833.

Good to know. The preamble's account of the Black Hawk War is the United States' own.

Summarized with AI assistance from 3 sources and checked against their words; not yet reviewed by historians or by the nations. Report an error

What the sources say, and how this was checked

Well supported by the sources below.

  1. partly as indemnity for the expense incurred, and partly to secure the future safety and tranquillity of the invaded frontierTribal Treaties Database (OSU)
  2. shall be held as hostages for the future good conduct of the late hostile bandsTribal Treaties Database (OSU)
  3. Sac and FoxStatutes at Large, vol. 7 (GovInfo)

Research notes. The page describes the cession's boundaries but states no acreage. The only account of the war cited is the treaty's preamble, which is the United States' own.

What the treaty did to the land

About 5.4 million acres given up. about 276,000 acres recognized, kept or set aside for the nations. Each shape is a numbered area in the federal government’s 1899 record of land cessions.

What happened next

Everything the record holds about this land and this treaty, in order: what earlier agreements said, what this one did, and what the United States, the courts and the nations did afterwards.

  1. 1832

    This treaty

    About 5.4 million acres ceded to the United States by the Sauk and Fox. About 276,000 acres set aside as a reservation for the Sauk and Fox

    After the Black Hawk War, the Sac and Fox ceded a Mississippi frontier tract in 1832, keeping 400 square miles, for annuities.

  2. 1833

    This treaty

    Ratified by the Senate

  3. 1836

    Land lost

    About 276,000 acres ceded to the United States by the Sauk and Fox

    By Sauk and Fox at Treaty Ground on the Mississippi Opposite Rock Island, Dubuque County, Wisconsin Territory (1836)

    area 226

Who is doing the work today

The nations connected to this treaty come first, then groups returning land and defending treaty rights. Support goes directly to them.

Who is doing the work

This history belongs to living nations. Start with them:

Native legal and land defense, nationally

Gifts go straight to each organization; this atlas takes nothing. Listing is not endorsement: how organizations are listed.

Sources

Sources

  1. digitreaties.org/treaties/treaty/176534051reference work
Research notes

$640,000 payment (~$0.11/acre) per Wikipedia (pointer). Ratification detail: 1833-02-13 (proclaimed; Senate-consent date not located)

Shapes are approximate and are not legal descriptions of land, title or jurisdiction.