(000782) Howard, Robert West. Thundergate: The Forts of Niagara. Englewood Cliffs: Prentice-Hall, 1968. Hardcover. 8vo. 241 pages. Fine in Near Fine DJ. B&W Illustrations. DJ price clipped. A volume in The American Forts Series. Fort Niagara is a fortification originally built to protect the interests of New France in North America. It is located near Youngstown, New York, on the eastern bank of the Niagara River at its mouth, on Lake Ontario (Old Fort Niagara, Niagara Frontier, New York)