1) What country declared war on Serbia after it refused to accept the ultimatum issued by the Austro-Hungarian Empire?
2) What year did World War I officially start?
3) What was the main cause of World War I?
4) Who was the Commander-in-Chief of the British Expeditionary Force (BEF) at the beginning of the war?
5) What was the name of the secret alliance between Germany, Austria-Hungary and Italy?
6) When did World War I begin?
7) Who was the political leader of Germany during World War I?
8) Who was the political leader of Britain during World War I?
9) Which country was an ally of Germany during World War I?
10) What was the primary cause of World War I?