The incident that cause World War I to happen.
What is the assassination of Archduke Francis Ferdinand?
Britain, France, Italy, Serbia, Greece, Russia, Romania, and Montenegro fighting for this side.
What are Allies?
The name of this British liner that a German submarine torpedoed on May 1915.
What is Lusitania?
The treaty that blamed Germany for causing the war.
What is the Treaty of Versailles?
The leader of the Bolsheviks.
Who is Vladimir Lenin?
The place where the assassination of Ferdinand happened.
What is Sarajevo, Bosnia?
Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire fighting for this side.
What are Central Powers?
A term that means the spreading of ideas to promote a cause or to damage an opposing cause.
What is Propaganda?
A spread of a disease across a large area.
The last Tsar of Russia before the Russian revolution.
Who is Tsar Nicholas II?
The person who assassinated Ferdinand.
Who is Gavrilo Princip?
The name of large gas-filled balloons that Germany used to bomb the English coast.
What are Zeppelins?
This country declared war on Germany in 1917.
What is the United States?
A system in which a group of nations acts as one to preserve the peace of all.
What is collective security?
In 1922, Lenin's communist government united much of the old Russian empire into this nation.
What is the Soviet Union?
After Ferdinand was assassinated, Austria-Hungary declared war on what country.
What is Serbia?
The nickname of German submarines used during World War I.
What is U-boats?
In April 1917, This president asked Congress to declare war on Germany.
Who is President Wilson?
Territories administered by Western powers.
After Lenin's death in 1924, the Soviet Union's new leader is this person.
Who is Joseph Stalin?
After Germany invaded Belgium, This country declared war on Germany.
What is Britain?
World War I official ended on this date.
People who wanted to make extreme changes.
What are radicals?
A secret police force much like the Tsar's. They executed ordinary citizens.