Number in order the events that started World War I.
Germany declared war on Russia and France.
Great Britain declared war on Germany after German troops violate Belgian neutrality.
Italy signs secret treaty with Great Britain and joins the Allied powers.
Archduke Franz Ferdinand is assassinated by a Serbian nationalist.
Austria declares war on Serbia.
1. Archduke Franz Ferdinand is assassinated by a Serbian nationalist.
2. Austria declares war on Serbia.
3. Germany declares war on Russia and France.
4. Great Britain declares war on Germany after German troops violate Belgian neutrality.
5. Italy signs a secret treaty with Great Britain and joins the Allied powers.