World map in AD 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.

Historical map of the world in AD 400 showing the borders of states and empires — The world in AD 400, colored by ruling state. Grey land has no state recorded in the dataset.

Largest states in AD 400

State	Mapped area	Provinces
Sasanian Empire	2.9 million km²	72
Western Roman Empire	2.5 million km²	200
Jin	2.4 million km²	70
Rouran	2.4 million km²	20
Byzantine Empire	2 million km²	91
Huns	1.8 million km²	51
Chuban	1.5 million km²	16
Gupta	1.3 million km²	47
Ghana	850 thousand km²	10
Liang dynasty	680 thousand km²	7

What changed since AD 395

298 provinces changed hands between AD 395 and AD 400.
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.
New on the map: Byzantine Empire.
No longer on the map: Roman Empire and Marcomanni.

Battles, AD 400 - AD 475

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

Empire maps for this period

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