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 (1977–present)
At the same ceremony in Washington, representatives of the United States and Panama signed a series of fourteen executive agreements associated with the treaties. These included two Agreements in Implementation of Articles III and IV of the Panama Canal Treaty that detailed provisions concerning operation, management, protection, and defense, outlined in the main treaty. Most importantly, these two agreements defined the areas to be held by the United States until 2000 to operate and defend the canal. These areas were distinguished from military areas to be used jointly by the United States and Panama until that time, military areas to be held initially by the United States but turned over to Panama before 2000, and areas that were turned over to Panama on October 1, 1979.