11) Which country declared war on Germany on August 1, 1914?
12) Where was the major naval battle of World War I fought?
13) Which country declared war on Serbia in 1914, ultimately triggering World War I?
14) In what year did World War I officially end?
15) What were the Central Powers during World War I?
16) What treaty was signed to end World War I?
17) Which country was not a member of the Allied Powers during World War I?
18) What battle was known as the 'Miracle on the Marne'?
19) Who was the commander-in-chief of the German Army during World War I?
20) What was the name of the German submarine campaign during World War I?