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