Classic Top Trumps - WW1: A History - WW1 Top 30 Moments - 1914, Serbia. Gavrilo Princip walks towards the carriage where Archduke Franz Ferdinand and his wife Sophie greet the public... and shoots them! Unknowingly, Princip set in motion a series of events that changed irreversibly the world's destiny. 'Top Trumps WW1' pays homage to all those who courageously fought this terrible war in one way or another, accounting for the 30 Key Moments that led the world to change forever. Relive the struggle with this all new pack of Top Trumps, learning how a local clash turned into a worldwide conflict like never seen before.