List of military legions
| Military organization | ||
|---|---|---|
 |
||
| Typical units | Typical numbers | Typical commander |
| fireteam | 3–4 | corporal |
|
squad/ section |
8–12 | sergeant |
| platoon | 15–30 | lieutenant |
| company | 80–150 | captain/major |
|
battalion/ cohort |
300–800 | lieutenant colonel |
|
regiment/ brigade |
2,000–4,000 |
colonel/ brigadier general |
|
division/ legion |
10,000–15,000 | major general |
| corps | 20,000–40,000 | lieutenant general |
| field army | 80,000+ | general |
| army group | 2+ field armies |
field marshal/ five-star general |
|
region/ theater |
4+ army groups | Six-star rank/Head of state |
This list of military legions is in chronological order where possible. In modern times, most units using the name "legion" were composed of soldiers from a specific ethnic, national, religious or ideological background, and that background is often specified in the legion's name.
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