Size of the Roman army
Late Roman empire (284 - 337)

Size of the Roman army

Section Title: Late Roman empire (284 - 337)
Table Section Text: None

Military units	Tiberius 24	Trajan 107	Hadrian ca. 135	Marcus Aurelius 166/7	Septimius Severus 211	Aurelian 275	Diocletian 305	Constantine I 337

Legionaries	125,000	165,000	154,000	165,000	182,000	209,000	265/280,000	320/335,000

Legions	25	30	28	30	33	37-38	53-56	64-67

Auxiliaries	125,000	224.000	224.000	224.000	250.000	~250.000 (?)	~250.000 (?)	~243/228.000 (?)

Praetorian guard and other garrisons of Rome	~10,000	~15,000	~15,000	~15,000	~20,000	~20,000	24,000	18,000

Roman navy	~40,000	~50,000	~50,000	~50,000	~50,000	~45,000	45.500	64.000

Total Roman forces	300,000	454,000	443,000	454,000	502,000	524,000	584,000-599,500	645,000

Sentence(s)

The Size of the Roman army, under Trajan, was 30 legions.

final_sentence: The Size of the Roman army, under Trajan, was 30 legions.