Didius Julianus
Although Laetus himself had been responsible for the accession of Pertinax, his claim to the imperial purple was opposed by the majority of the Praetorian Guard, forcing Pertinax to secure their support with an excessive promise of money. When he managed to pay only half of the promised sum however, he was deserted by Laetus and killed by rogue Praetorians. In one of the most infamous episodes in Roman history, the guard then proceeded to sell the Empire by auction to Didius Julianus. In response, the armies of Pescennius Niger, Clodius Albinus and Septimius Severus rose in revolt, and marched on Rome. When his demise appeared imminent, Didius Julianus ordered the execution of Laetus and the conspirators against Commodus, on suspicion that they would side with Severus.