Causes
This assassination in 1914 sparked the start of World War I.
Archduke Franz Ferdinand
The dangerous area between opposing trenches was called this.
No Man's Land
This rapid-fire weapon made charging across battlefields extremely deadly.
Machine Gun
Governments encouraged citizens to buy these to help pay for the war.
War Bonds
This country was blamed for starting World War I in the Treaty of Versailles.
Germany
This alliance included Germany, Austria-Hungary, and Italy before the war began.
Triple Alliance
Soldiers often suffered from this painful foot condition caused by wet trenches.
Trench Foot
These armored vehicles were first introduced by Britain in 1916.
Tanks
This type of poster was commonly used to encourage enlistment and patriotism.
Propoganda
This empire controlled much of the Middle East before collapsing after World War I.
Ottoman Empire
National pride and competition between nations are known by this term.
Nationalism
These attacks involved soldiers rushing enemy trenches on foot.
Infantry Charges
Poison gas, including chlorine and mustard gas, was banned after the war because of these effects.
Chemical Weapons Injuries
During the war, many women took over these jobs traditionally held by men.
Factory Jobs
This nation left the war after the Bolshevik Revolution in 1917.
Russia
This system of building up armed forces increased tensions before the war.
Militarism
Rats, mud, and this constant artillery attack made trench life miserable.
Shelling
These underwater German vessels attacked Allied ships.
U-Boats
To conserve resources, governments often introduced this system, limiting food purchases.
Rationing
This country joined the Allies in 1917 after the Zimmermann Telegram and submarine attacks.
United States
This complex network of agreements pulled many nations into war after 1914.
Alliance System
This major 1916 battle became one of the deadliest in human history.
Battle of the Somme
This new form of aerial combat featured pilots known as “aces.”
Fighter Planes
This 1918 global flu pandemic spread rapidly, partly because of wartime troop movements.
Spanish Flu
This Balkan country was invaded by Austria-Hungary after the assassination of Franz Ferdinand.
Serbia