# World map in AD 400

Source page: https://geographichistory.app/map/400/

192 states share the map in AD 400. The largest by mapped area are Sasanian Empire, Western Roman Empire and Jin.

Sasanian Empire is the largest state on the map in AD 400, a position it has held since AD 396 (before that: Roman Empire). It stays in first place until AD 401, when Rouran takes over. The five largest states hold 31% of all land with a recorded ruler. 70% of the land on the map has no recorded state. The number of states is about the same as in AD 395: 192 against 193.

## Largest states in AD 400

| State | Mapped area (km²) | Provinces |
|---|---|---|
| Sasanian Empire | 2,925,000 | 72 |
| Western Roman Empire | 2,466,000 | 200 |
| Jin | 2,431,000 | 70 |
| Rouran | 2,426,000 | 20 |
| Byzantine Empire | 1,986,000 | 91 |
| Huns | 1,831,000 | 51 |
| Chuban | 1,451,000 | 16 |
| Gupta | 1,291,000 | 47 |
| Ghana | 849,000 | 10 |
| Liang dynasty | 680,000 | 7 |

## Changes since AD 395

298 provinces changed hands.
- Western Roman Empire gained about 2.5 million km², mostly from Roman Empire.
- Byzantine Empire gained about 2 million km², mostly from Roman Empire and Kingdom of Armenia.
- Rugii gained about 56 thousand km², mostly from Marcomanni.
- Pommern gained about 34 thousand km², mostly from Rugii.

## Battles AD 400 - AD 475

- AD 402: Asta (Goth Invasion of the Roman Empire), won by Romans, Vandals
- AD 402: Pollentia (Goth Invasion of the Roman Empire), won by Rome
- AD 403: Verona (Goth Invasion of the Roman Empire), won by Rome
- AD 404: Zhengrong (Wars of the Sixteen Kingdoms Era), won by Jin
- AD 405: Faesulae (Gothic Invasion of Italy (Radagaisus)), won by Rome
- AD 408: Rome (Goth Invasion of the Roman Empire), won by Visigoths
- AD 409: Ostia (Goth Invasion of the Roman Empire), won by Goths
- AD 430: Hippo Regius (Roman-Vandal Wars), won by Vandals
- AD 451: Avarayr (Christian Rising in Armenia), won by Persia
- AD 451: Chalons (Hun Invasion of the Roman Empire), won by Rome
- AD 454: Nedao (Hun Ostrogoth Wars), won by Gepids
- AD 460: Cartagena, Spain (Roman-Vandal Wars), won by Vandals of North Africa