After assassinating the Roman Emperor Pertinax, his Praetorian Guards auction off the throne to Didius Julianus.

Assassination is the willful killing, by a sudden, secret, or planned attack, of a person—especially if prominent or important. It may be prompted by political, ideological, religious, financial, or military motives.

Publius Helvius Pertinax was Roman emperor for the first three months of 193. He succeeded Commodus to become the first emperor during the tumultuous Year of the Five Emperors.

The Praetorian Guard was the imperial guard of the Imperial Roman army that served various roles for the Roman emperor including being a bodyguard unit, counterintelligence, crowd control and gathering military intelligence.

Marcus Didius Julianus was Roman emperor from March to June 193, during the Year of the Five Emperors. Julianus had a promising political career, governing several provinces, including Dalmatia and Germania Inferior, and defeated the Chauci and Chatti, two invading Germanic tribes. He was even appointed to the consulship in 175 along with Pertinax as a reward, before being demoted by Commodus. After this demotion, his early, promising political career languished.

March 28 is the 87th day of the year in the Gregorian calendar; 278 days remain until the end of the year.