The United States first attempted to acquire control of a canal on the Panamanian isthmus via the Hay-Herran Treaty of 1903, but the treaty was not ratified. Desperate to construct a canal, the United States saw the separatist movement as an opportunity. Despite the Bidlack-Mallarino Treaty of 1846 in which the United States would intervene in the event of a disorder between Panama and Colombia in Colombia's favor, the United States prevented Colombian forces from moving across the isthmus to stop the Panamanian uprising.[2] On November 4, 1903, the immediate support of the USA secured the Declaration of Independence of Panama from Colombia. In return, Panama signed the Hay–Bunau-Varilla Treaty three weeks later, granting the USA sovereign rights over the interoceanic canal that would be built over the following decade.