It was the trigger but not the cause. Please see the related question.
The Archduke of Austria Franz Ferdinand, although his murder wasn't the primary cause.
Archduke Franz Ferdinand of Austria.
How Did World War 1 Start? The immediate cause for World War 1 was the assassination of the Archduke Franz Ferdinand of Austria and his pregnant wife Sophie. Archduke Franz Ferdinand of Austria was the nephew of Emperor Franz Josef and heir to the throne of Austria and Hungary
The major cause the first world war the Assassination of Archduke Franz Ferdinand of Austria and his wife by Gavrilo Princip Other reasons are secondary.
it ws the assassination of Archduke Franz Ferdinand
Murder of Archduke Franz Ferdinand of Austria set-off chain reaction of national treaties guaranteeing alliances/protections and they honored those agreements until they were all at war with each other.The spark that caused the first world war was the assassination of Archduke Franz Ferdinand by Gavrilo Princip
Archduke Franz Ferdinand of Austria was assassinated in Sarajevo in 1914 by terrorist.
The cause of World War 1 was because of the assassination of Archduke Franz Ferdinand. Ferdinand was the next in line for the throne of Austria. Austria then put the blame on Serbia, starting World War 1.
Austria-Hungary, Serbia and in a way Germany because they were backing Austria-Hungary
The assassination of Archduke Franz Ferdinand
the assassination of archduke franz Ferdinand
The immediate cause of World War 1 was the assassination of Archduke Ferdinand of Austria. It led to the invasion of Serbia and subsequent declaration of war by Russia.