What was an unintended consequence of the Northwest Ordinance? It outlawed enslavement in the Northwest Territory, Increasing tensions between states that practiced enslavement and free states. It led to a peace agreement between the federal government and American Indians tribes, ending tensions between settlers and American Indians. It led to the creation of American Indian reservations, increasing tensions between settlers and American Indians. It created new states that allowed enslavement, ending tensions between the federal government and state governments.