Kinzua Dam on the Allegheny River in Pennsylvania was a flashpoint in history for the Seneca Nation of Indians. Completed in 1965, the dam was originally proposed to help mitigate flooding in Pittsburgh, almost 200 miles downriver, but the 27-mile reservoir that formed behind it inundated vast tracts of the Seneca Indians’ ancestral lands, forcing their removal in breach of the United States’ oldest treaty then in effect. Set against a backdrop of a federal Indian termination policy, pork-barrel politics, and undisclosed plans for private hydropower, Lake of Betrayal reveals an untold story from American history—a one-sided battle pitting an impoverished Native American nation against some of the strongest political, social and commercial forces in the country as they fought to protect their lands and way of life. And although the Seneca suffered irreplaceable cultural losses, the Kinzua crisis became a turning point to more aggressively protect and exercise their sovereignty and build a stronger Seneca Nation.