Causes of WWI
This term describes pride in one’s nation and was a major cause of WWI.
What is nationalism
Soldiers fought from these long, dug‑out systems.
What are trenches
WWI officially began in this year.
What is 1914
This treaty officially ended WWI and punished Germany.
What is the Treaty of Versailles
Women working with TNT often had their skin turn this color.
What is yellow
The assassination of this archduke sparked the start of WWI.
Who is Archduke Franz Ferdinand
This disease caused by wet, unsanitary trench conditions infected soldiers’ feet.
What is trench foot
The U.S. entered WWI after this event involving a British passenger ship.
What is the sinking of the Lusitania
This organization was created after WWI to keep peace but failed.
What is the League of Nations
This animal was used to carry messages across battlefields.
What is a pigeon
This alliance included Germany, Austria‑Hungary, and the Ottoman Empire.
What are the Central Powers
This deadly gas, first used by Germany in 1915, caused choking and blindness.
What is chlorine gas
This 1917 message from Germany to Mexico helped push the U.S. into the war.
What is the Zimmermann Telegram
Germany was forced to pay these financial penalties after the war.
What are reparations
This new invention allowed soldiers to fight in the sky.
What are airplanes
This long-term cause involved countries competing to build the strongest military.
What is militarism
Soldiers often suffered from this psychological trauma caused by constant shelling.
What is shell shock
This battle introduced tanks for the first time in history.
What is the Battle of the Somme
This global event in 1929 worsened economic problems worldwide.
What is the Great Depression
This famous WWI nurse later founded the American Red Cross.
Who is Clara Barton
This crisis in 1914 involved Austria‑Hungary issuing demands to Serbia after the assassination.
What is the July Crisis
This 1916 battle became one of the bloodiest trench battles, lasting 10 months.
What is the Battle of Verdun
This armistice date marks the official end of WWI fighting.
What is November 11, 1918
This political leader rose to power in Germany partly due to WWI’s aftermath.
Who is Adolf Hitler
This WWI disease pandemic killed more people than the war itself.
What is the Spanish Flu