This term describes a country that did not take sides during World War I.
Neutral
This type of warfare involved soldiers fighting from deep ditches protected by barbed wire.
Trench warfare
President of the US during WWI
Woodrow Wilson
At the start of the war, the United States followed this foreign policy.
Neutrality
World War I officially ended in this year
1918
He was the heir to the Austro-Hungarian throne whose assassination helped trigger the war.
These were common trench conditions that caused illness and misery for soldiers.
Mud, rats, lice, disease - pick one!
Emperor of Germany and leader of the Central Powers
Kaiser Wilhelm II
This British passenger ship was sunk in 1915, killing 128 Americans.
The Lusitania
This 1919 treaty officially ended the war
Treaty of Versailles
This man assassinated Archduke Franz Ferdinand in Sarajevo.
Gavrilo Princip
This weapon introduced new dangers by causing soldiers to "drown on land."
Poison gas
This African American regiment spent more time in combat than many other units.
Harlem Hellfighters
These German submarines attacked Allied and neutral ships.
U-boats
Germany was required to pay __________ back to the allied powers
Reparations or money
This drew other countries into the fight because they already agreed to protect each other.
Alliances
No-man's land
This man led Russia during WWI.
Tsar Nicholas II
This secret German message promised Mexico U.S. territory if it joined the war against the United States.
The Zimmerman Telegram
These two empires dissolved after World War I
Austria-Hungary and the Ottoman Empire
This process of preparing troops and resources for war helped escalate the conflict once fighting began.
Mobilization
This event in 1914 marked a brief ceasefire where the troops exchanged cigarettes and food.
The Christmas Truce
This pigeon saved many American lives
Cher Ami
Allied powers
These were two new countries created after the war when Europe’s borders were redrawn.
Poland, Czechoslovakia, or Yugoslavia