Perhaps the only thing that kept the Union from falling to pieces in 1786 was the Northwestern Territory, which George Rogers Clark had conquered in 1779, and which skilful diplomacy had enabled us to keep The northwestern territory; the first national domain, 1780-87. when the treaty was drawn up in 1782. Virginia claimed this territory and actually held it, but New York, Massachusetts, and Connecticut also had claims upon it. It was the idea of Maryland that such a vast region ought not to be added to any one state, or divided between two or three of the states, but ought to be the common property of the Union. Maryland had refused to ratify the Articles of Confederation until the four states that claimed the northwestern territory should yield their claims to the United States.