The legion was on the Tigris frontier in the middle of the 4th century, just before a major Roman defeat by the Persians in Singara, Mesopotamia.
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If so, it evidently survived that disaster as a functioning unit, and avoided the subsequent pit-falls of over-identification with the rebellion of the Macrianii and Palmyra's bid for autonomy under Zenobia.
Legio XVIII | Legio XVII | Legio XV Apollinaris | Legio XIX | Legio V ''Iovia'' | Legio V Iovia | Legio VI Herculia | Legio VI Ferrata | Legio II Augusta | legio VI Ferrata | legio III Gallica | Legio XX Valeria Victrix | Legio XIV Gemina | Legio X Equestris | Legio VI ''Ferrata'' | Legio IV Scythica | Legio II ''Augusta'' | Legio I Adiutrix |