United States territorial acquisitions
The Panama Canal Zone was an unorganized US territory located within the Republic of Panama. It was established under the Hay–Bunau-Varilla Treaty in 1903 and disestablished in 1979 under the Torrijos–Carter Treaties. Panama gained full control over the Panama Canal in 1999.
History of Panama
The Panama Canal, the area supporting the Canal, and remaining US military bases were turned over to Panama on December 31, 1999 in accordance with the Torrijos-Carter Treaties.