Only four days after Panama declared independence from Colombia—with tacit American naval support blocking Colombian troops from suppressing the revolt—President Theodore Roosevelt's administration extended diplomatic recognition to the new republic. The swift move let Washington negotiate the Hay–Bunau-Varilla Treaty weeks later, granting the U.S. control of the Canal Zone and setting the stage for construction of the Panama Canal, completed in 1914.
Colombia's senate had rejected a treaty that would have let the United States build a canal across its northern province of Panama, prompting Roosevelt to explore backing a secession movement instead. When Panamanian conspirators declared independence, U.S. naval vessels stationed offshore prevented Colombian reinforcements from landing to crush the rebellion, a display of gunboat diplomacy that critics at the time and since have called an act of imperial engineering.
Roosevelt recognized Panama with remarkable speed, eager to move past the political fight in Bogotá and start canal construction. Panama's new government, still finding its footing, quickly signed a treaty granting the U.S. a zone across the isthmus in perpetuity, negotiated not by a Panamanian but by a French engineer, Philippe Bunau-Varilla, acting on Panama's behalf—a detail many Panamanians resented for generations.
The canal, finished in 1914, transformed global shipping, cutting the journey between the Atlantic and Pacific from a voyage around Cape Horn to a matter of hours. The U.S. retained control of the Canal Zone until treaties signed by Jimmy Carter in 1977 set its return, completed in 1999.
Key people: Theodore Roosevelt, Manuel Amador Guerrero