Causes
New technology of WWI
War Horse
Allied or Central Powers?
Allied or Central, more.
100
The buildup of a nation's armed forces, mandatory conscription, and glorification of war.
What is militarism?
100
Type of chemical warfare.
What is mustard gas?
100
Where Albie and his family were from and who they fought for.
What is England, specifically, Devon. 
100
Russia.
What is Allied?
100
The United States.
Who are Allied, officially in 1917?
200
These dragged countries into conflicts that they weren't necessarily directly involved with. The Triple Entente and the one with Germany, Austria-Hungary and the Ottomans were the ones that expanded World War I.
What are alliances?
200
These were mostly used for scouting the enemy, in WWII they would be heavily utilized for dropping bombs.
What are airplanes?
200
Albie's father (Ted Narracott) was a veteran of these wars in South Africa.
What were the Boer Wars?
200
Germany.
What are Central Powers?
200
Russia withdrew from the war in 1917 for this reason.
What is their own revolution against their Czarist government had started?
300
Gaining and competing over natural resources and markets to sell products from this event of the 19th century that began in Great Britain and spread to western Europe and the United States is also a cause of World War I.
What is the Industrial Revolution?
300
These types of guns would largely replace rifles and other handheld firearms.
What are machine guns?
300
The punishment (in most militaries, during a time of war) was this, as we saw in the movie.
What is to be shot and executed?
300
Austro-Hungarian Empire.
Who are the Central Powers?
300
Japan.
Who were the Allied Power?
400
Extreme pride in one's country was used to unite people and make them willing to die for their countries, even if they didn't fully understand or agree with the reason they were fighting a war.
What is nationalism?
400
Underwater vessels that could strike without warning. The Germans utilized this heavily and it led to the development of radar to detect them.
What are submarines or U-boats?
400
The horses that were taken by the Germans would be used for this purpose until they died.
What is to pull artillery equipment?
400
Ottoman Empire.
Who were the Central Powers?
400
Italy.
What is they started out in an alliance with the Central Powers but switched sides and fought for the Allied Powers?
500
Troops served in Europe from as far away as India, Algeria, French Indochina (Vietnam), New Zealand, Australia, and West Africa. This is an example of another cause of the war. The competition to build empires and colonialism brought those men to Europe.
What is imperialism?
500
This metal material was strewn throughout no-man's land and made movement painful, dangerous, stuck, and deadly.
What is barbed wire?
500
The reason the German soldiers were permitted to take whatever they wanted from the French grandfather and the little French girl, Emilie.
What is because it is war, they're completed armed and they don't have choice?
500
France.
Who were the Allied Powers?
500
Bulgaria.
Who were the Central Powers?