Herculians
Jovians and Herculians
Imperial guard units under Roman Emperor Diocletian in the late 3rd century AD
The Jovians (Latin: Ioviani) and Herculians (Latin: Herculiani) were the senior palatine imperial guard units under the rule of Roman Emperor Diocletian (r. 284–305). They continued in existence thereafter as senior units in the field armies of the Western and Eastern Roman Empires.