On September 1, 1939 Germany invaded Poland. Great Britain and France had warned Hitler that if he invaded Poland, they would declare war.
Franz Ferdinand
The assassination of Archduke Ferdinand.
Nazi Germany, when it invaded Poland.
Archduke Ferdinand Ferdinand of Austria
The German invasion of Poland on 1st September 1939
archduke franz Ferdinand of austro-Hungary
Historians still argue about it. It comes down to Serbia or Austria-Hungary.
Archduke Franz Ferdinand.
which event sparked world war 1?
September 1, 1939 was the official beginning of World War 2.
The German invasion of Poland on 1 September 1939.
Pearl Harbour