This man "lit the match" by assassinating Franz Ferdinand.
Who was Gavrilo Princip?
To protect themselves from machine gun fire, soldiers on both sides created an extensive network of these.
What are trenches?
At the beginning of the War, American did not join either the Allies or the Central Powers, but was _________.
What is "neutral"?
Soldiers dug trenches to protect themselves from these.
What are machine guns?
These cat-sized animals were a menace in the trenches.
What are rats?
The assassination of Archduke Ferdinand provided an ________ for war, rather than being the "cause."
What is an "excuse"?
British and German soldiers briefly ceased fighting in observance of this holiday.
What is Christmas?
Germany used these to attack any ship which entered the warzone, including ships carrying American civilians.
What are submarines/U-boats?
This was loaded into explosive shells in an attempt to clear out trenches.
What is poison gas?
America's President during WWI.
Who was Woodrow Wilson?
These nations formed the "big three" Allies at the beginning of the War.
Who were Britain, France, and Russia?
Soldiers would frequently fall ill to this malady, and spend months recovering.
What is Trench Fever?
in 1917, Germany wrote a note to this country, encouraging them to attack America.
What is Mexico?
The British invented these in an attempt to break the stalemate on the Western Front.
What are tanks?
This country withdrew from the Allied Forces after their Revolution.
What is Russia?
These two nations were the most prominent of the Central Powers.
Who were Austria-Hungary and Germany?
In 1916, Britain began on of these, requiring men 18 to 41 to sign up for military service.
What is a "draft"?
Nickname for American soldiers in WWI.
What are "doughboys"?
These made it possible to attack U-boats while they were submerged.
What are depth charges?
The Lusitania sank in only 18 minutes after a mysterious ____________.
What is a second explosion?
Great Britain joined the Allies after Germany violated this country's neutrality.
What is Belgium?
Men who were exempt from the British Draft included the chronically ill, clergymen, and certain classes of these.
What are "industrial workers"?
In addition to taking over jobs which were previously filled by men, American women worked as clerks, nurses, and electricians in these branches of the military
What are the Navy and Marine Corps?
This made it possible for planes in the air to communicate with their allies on the ground.
What is air traffic control?
After the Armistice, this county was forced to accept blame for starting the War.
What is Germany?