January 10, 1964 (mao winter months 26), Panama announced to break off diplomatic relations with the United States, and demanded the return of ownership of the Panama Canal.

Panama's relations with the United States occupies a special place in Panama's foreign relations.
1903 U.S. landing in Panama, and instigated Pakistan independence from Colombia to the establishment of the Republic of Panama. On November 18 of the same year, the permanent use of the United States to obtain the permanent monopoly of the construction and operation of the canal and the Canal Zone, occupation and control rights. World War II, the United States in Pakistan strong rent 134 military bases, one after another after the 1947 return of part. January 10, 1964, Pakistan, and the United States broke off diplomatic relations, and asked the United States to return ownership of the Panama Canal, and the resumption of diplomatic relations in April of the same year. In September 1977, Pakistan and the United States signed a new canal treaty. December 31, 1999, the Panama canal recovery of sovereignty. (History. Cn)