Causes of World War I
This system of military agreements meant countries would defend each other if war broke out.
What are alliances?
This group of countries included France, Russia, and the United Kingdom during WWI.
What are the Allied Powers?
Soldiers on the Western Front spent most of their time fighting from these deep defensive ditches.
What are trenches?
This weapon dramatically increased the number of bullets fired per minute in WWI battles.
What is a machine gun?
This treaty officially ended World War I in 1919.
What is the Treaty of Versailles?
This belief in building large armies and weapons increased tension between European nations before WWI.
What is militarism?
This country joined the Allied Powers in 1917, shifting the balance of the war.
What is the United States?
This dangerous area between opposing trenches had no cover and was heavily guarded.
What is No Man’s Land?
This chemical weapon forced soldiers to wear protective masks in battle.
What is poison gas?
This country was forced to accept blame and pay reparations after WWI.
What is Germany?
This competition for overseas territories and resources caused conflict among European powers.
What is imperialism?
This alliance included Germany, Austria-Hungary, and the Ottoman Empire.
What are the Central Powers?
These conditions in trenches included mud, rats, disease, and flooding.
What are poor living conditions?
These underwater military vessels were used by Germany to attack Allied ships.
What are submarines (U-boats)?
These three empires collapsed after the war ended.
What are the German, Austro-Hungarian, and Ottoman Empires?
This political idea encouraged intense pride and loyalty to one’s country and often led to conflict between nations.
What is nationalism?
This empire controlled large areas of the Middle East before collapsing after WWI.
What is the Ottoman Empire?
This World War I battle resulted in over one million casualties and symbolized trench warfare’s brutality.
What is the Battle of the Somme?
This armored vehicle was first introduced to break through trench defenses.
What is a tank?
This global conflict is widely considered to have been influenced by unresolved tensions from WWI.
What is World War II?
This 1914 assassination of a royal figure directly triggered the start of World War I.
Who is Archduke Franz Ferdinand of Franz Ferdinand?
This European country was responsible for issuing the ultimatum to Serbia after the assassination in 1914.
What is Austria-Hungary?
This type of warfare led to long stalemates where neither side could gain significant ground.
What is trench warfare?
These aircraft were used for reconnaissance and later combat during WWI.
What are airplanes?
These economic and political conditions in Europe after WWI contributed to instability and future conflict.
What are war debts, reparations, and political instability?