- The Frontier in American History
- The Path of Empire: A Chronicle of the United States as a World Power
- The Winning of the West, Volume 1: From the Alleghanies to the Mississippi, 1769-1776
- The Winning of the West, Volume 2: From the Alleghanies to the Mississippi, 1777-1783
- The Winning of the West, Volume 3: The Founding of the Trans-Alleghany Commonwealths, 1784-1790
- The Winning of the West, Volume 4: Louisiana and the Northwest, 1791-1807