When did Germany invade Luxembourg during World War II? When did Germany surrender in WW1? When did Serbia recognize Bosnia and Herzegovina? When did Serbia gain independence from Austria-Hungary? When did Croatia become an independent country?
How did Hitler establish a totalitarian state in Germany? How was Austria-Hungary responsible for WW1? How did Charles V of Spain rule Austria? How did the Russian Empire become communist? How did the Russian Empire include the Cossacks? How did the dual monarchy of Austria-Hungary function?
When was Ukraine taken over during the Cold War? When did Austria-Hungary surrender in WW1? When did Germany surrender in WW1? When was the First Fitna war? When was the Turkish War of Independence? When was the Algerian War of Independence? When were the Samnite Wars? When was WW1 ...