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.
Zonian
A Zonian is a person associated with the Panama Canal Zone, a political entity which existed between 1903 and the absorption of the Canal Zone into the Republic of Panama between 1980 and 2000. Many Zonians are descendants of the civilian American workers who came to the area during the early 1900s to work and maintain the canal. Today Zonians might work at the canal itself. Others may have been American citizens born in the Canal Zone or who spent their childhood there. A significant presence of American canal workers remained in the Canal region until 1999.