Panama Canal
Colombia, France, and later the United States controlled the territory surrounding the canal during construction. The US continued to control the canal and surrounding Panama Canal Zone until the 1977 Torrijos–Carter Treaties provided for handover to Panama. After a period of joint American–Panamanian control, in 1999, the canal was taken over by the Panamanian government. It is now managed and operated by the government-owned Panama Canal Authority.
History of the Panama Canal
Roosevelt implied to Panamanian rebels that if they revolted, the US Navy would assist their fight for independence. Panama declared its independence on November 3, 1903, and the USS "Nashville" impeded Colombian interference. The victorious Panamanians gave the United States control of the Panama Canal Zone on February 23, 1904, for $10 million in accordance with the November 18, 1903 Hay–Bunau-Varilla Treaty.