1914
Franz Ferdinand
In World War 1 France declared war on the central powers which included Austria-Hungary two countries combined under one monarch.
Austria-Hungary
Serbia
The first Central Power to declare war during World War I was Austria-Hungary. On July 28, 1914, Austria-Hungary declared war on Serbia following the assassination of Archduke Franz Ferdinand. This declaration set off a chain reaction of alliances and declarations of war among the major powers of Europe.
6th august 1914
in 1914
Assassination of Archduke Franz Ferdinand of Austria .
Because Russia Invaded Austria.
Austria-Hungary on Serbia.
Austria-Hungary.