Question: The Treaty of Fort Harmar was an agreement between the United States government and numerous Native American tribes with claims to what post-AMerican revolutionary War territory northwest of the River Ohio, and that legally existed from July 13 1787 until March 1, 1803?

<P0-S0> The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio, and also known as The Ordinance of 1787) was an act of the Congress of the Confederation of the United States (the Confederation Congress), passed July 13, 1787. <P0-S1>  The ordinance created the Northwest Territory, the first organized territory of the United States, from lands beyond the Appalachian Mountains, between British North America and the Great Lakes to the north and the Ohio River to the south. <P0-S2>  The upper Mississippi River formed the Territory's western boundary. <P0-S3>  It was the response to multiple pressures: the westward expansion of American settlers, tense diplomatic relations with Great Britain and Spain, violent confrontations with Native Americans, the weaknesses of the Articles of Confederation, and the empty treasury of the American government. <P0-S4>  It was based upon, but more conservative than Thomas Jefferson's proposed ordinance of 1784. <P0-S5>  The 1787 law relied on a strong central government, which was assured under the new Constitution that took effect in 1789. <P0-S6>  In August 1789, it was replaced by the Northwest Ordinance of 1789, in which the new Congress reaffirmed the Ordinance with slight modifications. <SEP> <P1-S0> The post-American Revolutionary War Territory Northwest of the River Ohio, more commonly known as the Northwest Territory encompassing most of the pre-war territory of the Ohio Country, parts of Illinois Country, and parts of old French Canada below the Great Lakes was an organized incorporated territory of the United States spanning most or large parts of six eventual U.S. States. <P1-S1>  It existed legally from July 13, 1787, until March 1, 1803, when the southeastern portion of the territory was admitted to the Union as the state of Ohio, and the remainder was reorganized by additional legislative actions. <SEP> <P2-S0> The Connecticut Company or Connecticut Land Company (e.-1795) was a post-colonial land speculation company formed in the late eighteenth century to survey and encourage settlement in the eastern parts of the newly chartered Connecticut Western Reserve of the former "Ohio Country" and a prized-part of the Northwest Territory)—a post-American Revolutionary period region, that was part of the lands-claims settlement adjudicated by the new United States government regarding the contentious conflicting claims by various Eastern Seaboard states on lands west of the gaps of the Allegheny draining into the Allegheny, Monongahela, and Ohio Rivers. Under the arrangement, all the states gave up their land claims west of the Alleghenies to the Federal government save for parts parceled out to each claimant state. <P2-S1>  Western Pennsylvania was Pennsylvania's part, and the Connecticut Western Reserve was the part aportioned to Connecticut's claim. <P2-S2>  The specific Connecticut Western Reserve lands were the northeastern part of the greater Mississippi drainage basin lands just west of those defined as part of Pennsylvania's claims settlement (Western Pennsylvania). <SEP> <P3-S0> The Treaty of Fort Harmar was an agreement between the United States government and numerous Native American tribes with claims to the Northwest Territory. <P3-S1>  It was signed at Fort Harmar, near present-day Marietta, Ohio, on January 9, 1789. <P3-S2>  Representatives of the Iroquois Six Nations and other groups, including the Wyandot, Delaware, Ottawa, Chippewa, Potawatomi and Sauk met with Arthur St. Clair, the governor of the Northwest Territory, and other American leaders such as Josiah Harmar and Richard Butler.