Gaius Vettius Sabinianus Julius Hospes was a Roman military officer and senator. He was born into the equestrian order, possibly in North Africa. He held the traditional series of military, administrative and judicial positions of steadily increasing responsibility which aspiring upper class Romans were expected to progress through, known as the cursus honorum. He had a long and distinguished military and political career under the reigns of the emperors Antoninus Pius, Marcus Aurelius and Commodus.

Legio I Italica was a legion of the Imperial Roman army founded by emperor Nero on September 22, 66. Originally named Legio Phalanx Alexandri Magni, it was stationed in Italy during the year of four emperors and gained the name Italica. It was later stationed at Novae, near modern-day Svishtov (Bulgaria). There are still records of the I Italica on the Danube border at the beginning of the 5th century. The emblem of the legion was a boar.