In 1914, a single bullet fired into the chest of Archduke Ferdinand by a Serbian terrorist quickly and unexpectedly exploded into World War I. The Austro-Hungarians mobilized their armies to punish Serbia. Russia mobilized armies to defend their Serb “little Slavic brother.” Germany mobilized, then France, then Britain, and by 1918 there were 40 million casualties, 15-22 million dead.
