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?
Northwest Territory 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.
Northern Panhandle of West Virginia The Northern Panhandle is the northern of the two panhandles in the U.S. state of West Virginia. It is a culturally and geographically distinct region of the state. It is the state's northernmost extension, bounded by Ohio and the Ohio River on the north and west and the state of Pennsylvania on the east. Its unusual configuration is the result of the Revolutionary-era claims of Virginia's former Yohogania County boundary lying along the Ohio River, conflicting with interpretations of the Colony of Pennsylvania's royal charter. The conflict was settled by compromise in the 1780s. Today, due to the southern boundary being an extension of the Mason–Dixon line and the panhandle's proximity to the Pittsburgh area, the Northern Panhandle resembles more of the Midwestern United States or the Northeastern United States compared to the rest of the state (including the Eastern Panhandle of West Virginia), which is classified as part of the Upland South.