Which war became renowned for its horrific trench warfare?
Which war was called "The War to End All Wars"?
Which war lasted the longest?
Which war's civilian deaths outnumbered its military ones?
In which war did Russia attack Germany?
During which war was Turkey considered to be among the 'Central Powers'?
At the end of which war was the Versailles Treaty signed?
During which war were aircraft first deployed in significant numbers?
Harry Truman was U.S. President for part of which war?
Which war has been called 'The Great Patriotic War'?
In which war did the Battle of the Bulge take place?
During which war were flamethrowers first used?
At the start of which war did the Soviets invade parts of eastern Poland?
Blitzkrieg was a tactic used in which war?
Which war was Operation Barbarossa a key part of?