Complex sentence: The Land Ordinance of 1785 would go further by establishing a procedure for land sales in the new territory, however the Ohio River remained an effective boundary between the United States and the Northwest tribes for a few more years.
Split into simpler sentences: The Land Ordinance of 1785 would go further by establishing a procedure for land sales in the new territory. However, the Ohio River remained an effective boundary between the United States and the Northwest tribes for a few more years.