This weapon fired hundreds of rounds per minute and made charging across battlefields deadly.
What is a machine gun
Soldiers lived and fought in these long ditches.
What are trenches
This battle lasted about 10 months in 1916 and became a symbol of French resistance.
What is the Battle of Verdun
This country was led by Kaiser Wilhelm II during WWI.
What is Germany
Aircraft were first used mainly for this purpose.
What is reconnaissance (scouting)
This large weapon was used to fire explosive shells long distances.
What is artillery
The dangerous area between opposing trenches was called this.
What is No Man's Land
This 1916 battle saw over one million casualties.
What is the Battle of the Somme
This nation entered WWI in 1917 on the Allied side.
What is the United States
These underwater vessels sank enemy ships.
What are submarines (U-boats)
This weapon was first widely used at the Second Battle of Ypres in 1915.
What is poison gas
This condition caused painful swelling and infection of soldiers' feet.
What is trench foot
This First Battle stopped Germany's advance toward Paris.
What is the Battle of the Marne
This empire's archduke was assassinated, helping spark the war.
What is Austria-Hungary
This communication technology sent messages using radio signals.
What is wireless radio
These armored vehicles helped soldiers cross trenches and rough terrain.
What are tanks
Trenches were often protected by this sharp metal barrier.
What is barbed wire
This battle is known for the first large-scale use of tanks.
What is the Battle of the Somme
This country left the war after the 1917 Revolution.
What is Russia
This weapon could fire rapidly without constant reloading.
What is a machine gun
This weapon was commonly attached to the end of a rifle for close combat.
What is a bayonet
This country’s trench system stretched from the North Sea to Switzerland.
What is France
This 1918 offensive helped end the war in favor of the Allies.
What is the Meuse-Argonne Offensive
Germany was allied with this empire ruled by Sultan Mehmed V.
What is the Ottoman Empire
These large airships were used by Germany for bombing and reconnaissance.
What are Zeppelins