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.