Panama Canal Zone
The Panama Canal Zone () was an unincorporated territory of the United States from 1903 to 1979, centered on the Panama Canal and surrounded by the Republic of Panama. The zone consisted of the canal and an area generally extending on each side of the centerline, excluding Panama City and Colón, which otherwise would have been partly within the limits of the Zone. Its border spanned three of Panama's provinces. When reservoirs were created to assure a steady supply of water for the locks, those lakes were included within the Zone.
Philippe Bunau-Varilla
Bunau-Varilla, as Panama's ambassador to the United States, was invested with plenipotentiary powers by President Manuel Amador. Lacking formal consent of the government of Panama, he entered into negotiations with the American Secretary of State, John Hay, to give control of the Panama Canal area to the U.S. No Panamanians signed the resulting Hay–Bunau-Varilla Treaty, though it was ratified in Panama on December 2, 1903. Bunau-Varilla had received his ambassadorship through financial assistance to the rebels, he had not lived in Panama for seventeen years, and he never returned, leading to the charge that he was "appointed Minister by cable". Panamanians long resented his betrayed trust put in him by the new Panamanian authorities. The treaty was finally undone by the Torrijos–Carter Treaties in 1977.