The Spark of War
This event in Sarajevo ignited World War I.
What is the Assassination of Archduke Franz Ferdinand?
This battle was one of the longest and deadliest, symbolizing trench warfare.
Answer: What is the Battle of Verdun?
This alliance included Germany, Austria-Hungary, and Italy.
Answer: What is the Triple Alliance?
A German U-boat sank this British passenger liner, killing over 1,100 people, including Americans.
Answer: What is the Lusitania?
This treaty officially ended World War I and imposed harsh terms on Germany.
Answer: What is the Treaty of Versailles?
Austria-Hungary demanded Serbia meet these strict conditions after the assassination.
What is Austria-Hungary's Ultimatum to Serbia?
The first use of poison gas by Germany occurred during this battle.
Answer: What is the Second Battle of Ypres?
This agreement between France and Britain resolved colonial disputes and laid the foundation for the Triple Entente.
Answer: What is the Entente Cordiale?
The U.S. officially entered World War I after declaring war on this country.
Answer: What is Germany?
This treaty between Russia and Germany ended Russian participation in the war.
Answer: What is the Treaty of Brest-Litovsk?
The annexation of this region by Austria-Hungary heightened tensions with Serbia.
Answer: What is Bosnia?
This battle halted Germany's advance into France, leading to trench warfare.
Answer: What is the First Battle of the Marne?
Germany proposed an alliance with Mexico in this infamous communication.
Answer: What is the Zimmermann Telegram?
This intercepted communication pushed the U.S. closer to joining the war.
Answer: What is the Zimmermann Telegram?
This empire's unification following the Franco-Prussian War increased European tensions.
Answer: What is the German Empire?
The series of regional conflicts that weakened the Ottoman Empire and fueled tensions in Europe.
Answer: What are the Balkan Wars?
This battle resulted in massive casualties with minimal territorial gain.
Answer: What is the Battle of the Somme?
This crisis saw Germany challenge France's influence in North Africa, increasing tensions.
Answer: What is the First Moroccan Crisis?
American entry into the war was in part due to Germany's policy of unrestricted this.
Answer: What is submarine warfare?
The United States' entry into World War I is considered a turning point for this alliance.
Answer: What are the Allied Powers?
The first nation to declare war, setting off a chain reaction of alliances.
Answer: What is Austria-Hungary?
Germany's invasion of this neutral country prompted Britain to declare war.
Answer: What is Belgium?
This treaty ended Russia's involvement in World War I.
Answer: What is the Treaty of Brest-Litovsk?
This revolution in Russia prompted its withdrawal from World War I.
Answer: What is the Bolshevik Revolution?
This peace treaty redrew European borders and demanded reparations from Germany.
Answer: What is the Treaty of Versailles?