Completed the following sentence: The legion was used by Emperor Alexander Severus in his 235 campaign against the Sassanids. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ L. Petronius Taurus Volusianus, who later became Praetorian Prefect in 260 and Urban prefect in the mid-260s, was "Primus Pilus" of the legion at this time. 274) and no doubt suffered great losses when Aurelian overthrew Tetricus I in a bloody
Battle of the Catalaunian Fields (Châlons-en-Champagne) in 274.