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.
Panama Canal Zone
In 2008, during a minor controversy over whether Canal Zone–born John McCain, born in the Zone in 1936, was legally eligible for the presidency, the US Senate passed a non-binding resolution that McCain was a "natural born Citizen" of the United States.