World War I and World War II and the Korean War. The development of computers. Widespread air travel. The development of penicillin and other antibiotics. Enormous improvements in health care. Automobiles had been invented in 1913, but were rare; by 1960, they were common. Radio. Television. Color movies.
These may be the biggest ones.
Some cool things.
How It Happened - 1913 was released on: USA: 6 February 1913 UK: 4 May 1913
It Happened at the Beach - 1913 was released on: USA: 25 June 1913
It Happened in Java - 1913 was released on: USA: 31 July 1913
What Happened to Freckles - 1913 was released on: USA: 22 December 1913
world war two almost started in 1913, there was the agricultural revolution, the american civil war ended and started
William Howard Taft was president Between that he passed the sixteen amendment of the United State constitution
What Happened to Lizzie - 1913 is rated/received certificates of: UK:U
The Bachelor's Baby or How It All Happened - 1913 was released on: USA: 9 June 1913
swag nation
What Happened to Pimple The Suicide - 1913 is rated/received certificates of: UK:U
You need to narrow down this question a bit. WW1 took place 1914 - 1918, not 1913-1933.