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?

Context articles: Treaty of Fort Harmar
Connecticut Land Company
Fort Harmar
Harmar, Marietta
Treaty of Point Elliott
Battle of Fallen Timbers
Northwest Ordinance
Northwest Territory
Northwest Indian War
Treaty of Greenville

The Treaty of Fort Harmar was an agreement between the United States government and numerous Native American tribes with claims to the Northwest Territory.
 It was signed at Fort Harmar, near present-day Marietta, Ohio, on January 9, 1789.
 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.
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.
 Western Pennsylvania was Pennsylvania's part, and the Connecticut Western Reserve was the part aportioned to Connecticut's claim.
 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).
Fort Harmar was an early United States frontier military fort, built in pentagonal shape during 1785 at the confluence of the Ohio and Muskingum rivers, on the west side of the mouth of the Muskingum River.
 It was built under the orders of Colonel Josiah Harmar and took his name.
 The fort was intended for the protection of Indians, i.e., to prevent pioneer squatters from settling in the land to the northwest of the Ohio River.
 “The position was judiciously chosen, as it commanded not only the mouth of the Muskingum, but swept the waters of the Ohio, from a curve in the river for a considerable distance both above and below the fort.”
Harmar is a historic neighborhood in the city of Marietta, Ohio, United States.
 Located at the western side of the confluence of the Muskingum and Ohio Rivers, it grew up around the early Fort Harmar in the 1780s, being settled in conjunction with Marietta.
 After a period of forming part of Marietta, it existed separately beginning in 1837 before rejoining the mother city in 1890.
 Connected by bridge to the rest of the city, it retains much of its nineteenth-century architecture and landscape, and most of the neighborhood is now a historic district on the National Register of Historic Places.
The Treaty of Point Elliott of 1855, or the Point Elliott Treaty,—also known as Treaty of Point Elliot (with one "t") / Point Elliott Treaty—is the lands settlement treaty between the United States government and the Native American tribes of the greater Puget Sound region in the recently formed Washington Territory (March 1853), one of about thirteen treaties between the U.S. and Native Nations in what is now Washington.
 The treaty was signed on 22 January 1855, at "Muckl-te-oh" or Point Elliott, now Mukilteo, Washington, and ratified 8 March and 11 April 1859.
 Lands were being occupied by European-Americans since settlement in what became Washington Territory began in earnest from about 1845.
The Battle of Fallen Timbers (August 20, 1794) was the final battle of the Northwest Indian War, a struggle between Native American tribes affiliated with the Western Confederacy, including support from the British led by Captain Alexander McKillop, against the United States for control of the Northwest Territory (an area north of the Ohio River, east of the Mississippi River, and southwest of the Great Lakes).
 This land had been ceded to the United States in accordance with the Treaty of Paris (1783), but the Native Americans (who had not been party to the treaty) refused to comply with the treaty and relinquish control.
 British army bases were maintained there to support their Native allies.
 This ultimately led to the American offensive and subsequent British-Indian withdrawal from the territory altogether following the Treaty of Greenville.
 The battle, which was a decisive victory for the United States, ended major hostilities in the region until Tecumseh's War and the Battle of Tippecanoe in 1811.
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.
 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.
 The upper Mississippi River formed the Territory's western boundary.
 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.
 It was based upon, but more conservative than Thomas Jefferson's proposed ordinance of 1784.
 The 1787 law relied on a strong central government, which was assured under the new Constitution that took effect in 1789.
 In August 1789, it was replaced by the Northwest Ordinance of 1789, in which the new Congress reaffirmed the Ordinance with slight modifications.
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.
 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.
The Northwest Indian War (1785–1795), also known as the Ohio War, Little Turtle's War, and by other names, was a war between the United States and a confederation of numerous Native American tribes, with support from the British, for control of the Northwest Territory.
 It followed centuries of conflict over this territory, first among Native American tribes, and then with the added shifting alliances among the tribes and the European powers of France and Great Britain, and their colonials.
The Treaty of Greenville was signed on August 3, 1795, at Fort Greenville, now Greenville, Ohio; it followed negotiations after the Native American loss at the Battle of Fallen Timbers a year earlier.
 It ended the Northwest Indian War in the Ohio Country and limited strategic parcels of land to the north and west.
 The parties to the treaty were a coalition of Native American tribes, known as the Western Confederacy, and United States government represented by General Anthony Wayne for local frontiersmen.
 The treaty is considered "the beginning of modern Ohio history."