Answer
Herodianus, co-ruler of the Palmyrene Empire with his father Odaenathus, suffered the same fate as his father when they both fell victim to assassination. This tragic event, orchestrated by Odaenathus' cousin Maeonius, unfolded while the unsuspecting ruler was engaged in a campaign against the Sassanid Persians, a rival empire perpetually vying for territorial control within the region.