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.
Latin America–United States relations
Roosevelt was able to reverse a previous decision by the Walker Commission in favour of a Nicaragua Canal and pushed through the acquisition of the French Panama Canal effort. Panama was then part of Colombia, so Roosevelt opened negotiations with the Colombians to obtain the necessary permission. In early 1903, the Hay–Herrán Treaty was signed by both nations, but the Colombian Senate failed to ratify the treaty.