Located in: [[United States of America]]. The [[Northwest Territory]], also known as the [[Northwest Territory|Old Northwest]] and formally known as the [[Northwest Territory|Territory Northwest of the River Ohio]], was formed from unorganized western territory of the [[United States of America]] after the [[American Revolution]]. Established in [[1787-01-01 - 1787-12-31|1787]] by the [[Congress of the Confederation]] through the Northwest Ordinance, it was the nation's first post-colonial organized incorporated territory.