Trebonianus Gallus

Trebonianus Gallus (c. 206–253), from a senatorial family, was governing Moesia Superior when Decius fell at Abritus in June 251, whereupon his army proclaimed him emperor. He recognized Decius' surviving son Hostilian as co-emperor and bought peace from the Goths with an annual subsidy. When Hostilian died of plague, Gallus made his son Volusian his colleague.

In 253 Shapur I destroyed a Roman army at Barbalissos and sacked Antioch. Aemilianus was proclaimed emperor and marched on Italy. Gallus summoned Valerian with reinforcements, but he did not arrive in time; Gallus and Volusian were killed at Interamna in August 253.