Births on March 21

George Abecassis, English race car driver and pilot (d. 1991)

George Edgar Abecassis (21 March 1913 – 18 December 1991) was a British racing driver, and co-founder of the HWM Formula One team.

21 Feb

Balkan Wars
Ioannina is incorporated into the Greek state after the Balkan Wars.
25 Jun

Great Reunion of 1913
American Civil War veterans begin arriving at the Great Reunion of 1913.
3 Jul

Great Reunion of 1913
Confederate veterans at the Great Reunion of 1913 reenact Pickett's Charge; upon reaching the high-water mark of the Confederacy they are met by the outstretched hands of friendship from Union survivors.
4 Jul

Great Reunion of 1913
President Woodrow Wilson addresses American Civil War veterans at the Great Reunion of 1913.
16 Aug

HMS Queen Mary
Completion of the Royal Navy battlecruiser HMS Queen Mary.