Franz Ferdinand was
- an Austrian archduke
- a Serbian king
- a German emperor
Austria-Hungary always had close ties with
- Germany
- Serbia
- Russia
The United States entered the war
- in 1917
- in 1914
- in 1918
One of the reasons for the beginning of World War I was
- rising nationalism in the Balkans
- a weak emperor in Germany
- a powerful United States of America
The Triple Alliance consisted of
- Germany, Austria-Hungary and Italy
- Germany, Russia and Serbia
- Austria-Hungary, Germany and Russia
Bismarck did not want Great Britain and France to form an alliance with
- Russia
- Austria
- Serbia
Russia and Serbia
- were long-time friends
- were enemies during World War I
- always had good connections with Austria-Hungary
The western front was dominated by
- trench warfare
- air fights
- submarine battles
With their U-boats Germany
- blockaded harbours and attacked other ships
- fought along the American coast
- sank Russian ships
Germany helped Vladimir Lenin
- return to Russia
- overthrow the Austrian emperor
- live in secrecy in Switzerland