1903    The Hay-Bunau-Varilla Treaty is signed by the United States and Panama, giving the United States exclusive rights over the Panama Canal Zone.

1964    Martyrs' Day: Several Panamanian youths try to raise the Panamanian flag on the U.S.-controlled Panama Canal Zone, leading to fighting between U.S. military and Panamanian civilians.

1999    The United States Government hands control of the Panama Canal (as well all the adjacent land to the canal known as the Panama Canal Zone) to Panama. This act complied with the signing of the 1977 Torrijos-Carter Treaties.