sentences:  In 1821, the organization of Waterloo Township subsumed the portion of Brownsville Township remaining in Fayette County, along with a portion of Harrison Township west of the Whitewater River.The far eastern part of Fayette lying between the Treaty of Greenville treaty line of 1795 and the present eastern boundary line of Waterloo and Jennings townships was split off into the newly created Union County in 1821.In 1826, a small part in the southeastern portion of Jackson township not included in the limits of the county in 1818, being left a part of Franklin county, was attached to Fayette County.