The correct order of declarations of war at the beginning of World War I is:
- An assassin from Serbia kills the Archduke (Archduke Franz Ferdinand of Austria)
- Austria-Hungary declares war on Serbia
- Russia declares war on Austria-Hungary
- Germany declares war on Russia
- Germany declares war on France
- Great Britain declares war on Germany
This sequence illustrates the chain of events that led to the escalation of conflict and the involvement of various nations in World War I.