Births on April 10

Jack Badcock, Australian cricketer (d. 1982)

Clayvel Lindsay "Jack" Badcock (10 April 1914 – 13 December 1982) was an Australian cricketer who played in seven Tests from 1936 to 1938.

28 Jun

Assassination of Archduke Franz Ferdinand of Austria
Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo; this is the casus belli of World War I.
26 Jul

Bulgaria
Serbia and Bulgaria interrupt diplomatic relationship.
5 Aug

Traffic light
In Cleveland, Ohio, the first electric traffic light is installed.
15 Aug

Frank Lloyd Wright
A servant of American architect Frank Lloyd Wright murders seven people and sets fire to the living quarters of Wright's Wisconsin home, Taliesin.
1 Sep

Petrograd
St. Petersburg, Russia, changes its name to Petrograd.