Today is Saturday, October 10, the 283rd day of 2015. There are 82 days left in the year.

On this date:

In A.D. 19, Roman general Germanicus Julius Caesar, 33, died in Antioch under mysterious circumstances, possibly from poisoning.

In 1845, the U.S. Naval Academy was established in Annapolis, Maryland.

In 1913, the Panama Canal was effectively completed as President Woodrow Wilson sent a signal from the White House by telegraph, setting off explosives that destroyed a section of the Gamboa dike.

In 1938, Nazi Germany completed its annexation of Czechoslovakia’s Sudetenland.

In 1943, Chiang Kai-shek took the oath of office as president of China.

In 1955, the film version of the Rodgers & Hammerstein musical “Oklahoma!” premiered before an invitation-only audience at the Rivoli Theatre in New York.

In 1964, the first Summer Olympics to be held in Asia were opened in Tokyo by Japanese Emperor Hirohito. Entertainer Eddie Cantor, 72, died in Beverly Hills, California.

In 1967, the Outer Space Treaty, prohibiting the placing of weapons of mass destruction on the moon or elsewhere in space, entered into force.