Later that same day, Didius Julianus outmaneuvered Titus Flavius Sulpicianus (Pertinax's father-in-law and also the new City Prefect) for the title of Emperor. Flavius Sulpicianus offered to pay each soldier 20,000 sestertii to buy their loyalty (eight times their annual salary; also the same amount offered by Marcus Aurelius to secure their favours in 161). Didius Julianus however offered 25,000 to each soldier to win the auction and was proclaimed Emperor by the Roman Senate on 28 March.