Political map of Europe & the Mediterranean 14 April 69 AD (Year of the Four Emperors: Otho): Galba’s short reign came to a bloody end in mid-January 69 AD when he was murdered by the Praetorian Guard at the instigation of his lieutenant Otho. Denouncing Otho’s usurpation, the Gallic provinces (Roman Gaul) rallied behind the rebel Vitellius, whose forces invaded Italy and defeated Otho at the Battle of Bedriacum (First Battle of Bedriacum) in April.