The Hay-Bunau-Varilla Treaty is signed by the United States and Panama, giving the United States exclusive rights over the Panama Canal Zone.
The Hay–Bunau-Varilla Treaty (Spanish: Tratado Hay-Bunau Varilla) was a treaty signed on November 18, 1903, by the United States and Panama, which established the Panama Canal Zone and the subsequent construction of the Panama Canal. It was named after its two primary negotiators, Philippe-Jean Bunau-Varilla, the French diplomatic representative of Panama, and United States Secretary of State John Hay.