When did Belgium decolonize the Congo? When did Henry VII invade France? When did the Magyars invade Europe? When did Germany join NATO? When did Hitler's invasion of Poland end? When did East Francia become Germany? When did Britain join the Battle of Berlin?
When did Austria-Hungary declare war on Serbia? World War I World War I was a costly war (in time and casualties) that came to involve the world's superpowers through what was a cascade of alliances, ultimately being set-off by the assassination of Austrian Archduke Franz Ferdinand in Serb...
When did Austria-Hungary surrender in WW1? When did Austria establish a dual monarchy? When did the War of Austrian Succession begin? When did the Austro-Prussian War begin? When did Italy join WW2? When did Germany invade Belgium?
When did Bohemia join the Holy Roman Empire? When did the Mongol Empire conquer Persia and Russia? When did Italy invade Abyssinia? When did Serbia gain independence from Austria-Hungary? When did Germany invade Belgium? When did Austria-Hungary surrender in WW1?
When did Germany invade Poland? When did Germany invade Belgium? When did Austria-Hungary enter WW1? When did East Francia become Germany? When did Austria-Hungary surrender in WW1? When did German unification take place? When France defeated Austria during WW2, it acquired the country of ...