Legio X Fretensis was a legion of the Imperial Roman army. It was founded by the young Gaius Octavius in 41/40 BC to fight during the period of civil war that started the dissolution of the Roman Republic. X Fretensis is then recorded to have existed at least until the 410s.

Palmyra is an ancient city in the eastern part of the Levant, now in the center of modern Syria. Archaeological finds date back to the Neolithic period, and documents first mention the city in the early second millennium BC. Palmyra changed hands on a number of occasions between different empires before becoming a subject of the Roman Empire in the first century AD.