[["The Austria-Hungarian Empire started the first world war.", 159.0], ["The immediate cause was the assassination of Franz Ferdinand, archduke of Austria-Hungary. His death at the hands of Gavrilo Princip \u2013 a Serbian nationalist with ties to the secretive military group known as the Black Hand \u2013 propelled the major European military powers towards war", 12.0]]
who started first world war 1
history