Causes of WW1
This system of military build-up and arms competition increased tensions between European nations before 1914.
Militarism
Germany, Austria-Hungary, and the Ottoman Empire were part of this alliance.
Central Powers
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This type of warfare involved soldiers fighting from deep ditches dug into the ground.
Trench Warfare
This country joined the war in 1917 on the side of the Allies.
United States
This treaty officially ended World War I in 1919.
Treaty of Versailles
Serbian terrorist organization that wanted Bosnia to be free of Austria-Hungary and to become part of a large Serbian Kingdom.
Black Hand
France, Great Britain, and Russia were the main members of this alliance at the start of WWI.
Triple Entente
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The dangerous area between opposing trenches was known as this.
No Man's Land
This intercepted telegram promised Mexico land if it joined Germany against the U.S.
Zimmerman Telegram
This clause placed full blame for the war on Germany.
War Guilt Clause
Competition among European nations for colonies and resources in Africa and Asia is known as this cause of WWI.
Imperialism
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This country joined the war in 1917 on the side of the Allies.
United States
This weapon caused massive casualties and made it difficult for soldiers to cross open fields.
Machine Gun
A war based on wearing down the other side with constant attacks and heavy losses
War of Attrition
These large payments were forced on Germany as punishment for the war.
Reparations
This intense pride and loyalty to one’s country helped spark conflicts in places like the Balkans.
Nationalism
After Russia left the war in 1917, this revolution had overthrown its government.
Russian Revolution
This new chemical weapon caused choking, blindness, and panic on the battlefield.
Poison Gas
German forces sank this British ship carrying 1100 civilians including more than 100 Americans
Lusitania
This international organization was created to promote peace but the United States did not join.
League of Nations
This assassination in June 1914 triggered the start of World War I.
The assassination of Archduke Franz Ferdinand
This country declared war on Serbia after the assassination of Archduke Franz Ferdinand.
Austria-Hungary
This German naval policy involved sinking ships without warning.
Unrestricted Submarine Warfare
Wartime governments made active use of this to increase enthusiasm for the war
Propaganda
Many historians believe harsh terms of the Treaty of Versailles helped lead to this later global conflict.
World War 2