Year
The world in 400
In 400 the atlas holds 125 states standing across 5 regions. 3 things began that year - Nobatia, Western Liang (Sixteen Kingdoms) and Licchavis of Nepal - and 1 ended; 5 people were born and 1 died.
Only what Wikidata dates to the year is counted here; a thing dated to its decade is on the 400s page, and to its century on the 4th century.
What began in 400
By kind, the best known first; a war or a state is listed in the year it began.
States 3
- Nobatia · state · 400 – 650
- Western Liang (Sixteen Kingdoms) · state · 400 – 421
- Licchavis of Nepal · state · 400 – 750
What ended in 400
States that fell or were replaced, and wars and other things that ran past the year they began.
States 1
- Indo-Scythian Kingdom · state · 200 BCE – 400 CE
Born and died
By how many Wikipedias write about them.
Born in 400 5
- Pope Leo I · writer · 400 – 461
- Sozomen · writer · 400 – 450
- Aspar · politician · 400 – 471
- Hydatius · bishop · 400 – 469
- Heremigar · military personnel · 400 – 429
Died in 400 1
- Lü Guang · ruler · 337 – 400
Standing in 400
The states the atlas holds as standing that year, by region, the best known first, with who held the highest office where the record dates it.
Europe24 states
- San Marino · 301 – present
- Ancient Greece · 1201 BCE – 600 CE
- Ancient Rome · 753 BCE – 476 CE · Honorius, Roman emperor in the West since 393
- Huns · 106 – 673 · Uldin, King of the Huns since 400
- Goths · 100 – 1475
- Western Roman Empire · 285 – 476 · Honorius, Roman emperor in the West since 393
- Visigoths · 396 – 425 · Alaric I, King of the Visigoths since 395
- Vandals · 337 – 438
- Saxons · 283 – 799
- Burgundians · 154 – 409
and 14 more; every state of Europe.
Middle East and North Africa22 states
- Byzantine Empire · 285 – 1453 · Arcadius, Byzantine emperor since 395 and Aelia Eudoxia, Byzantine emperor since 395
- Troy · 3000 BCE – 500 CE
- Rhodes · 188 BCE – 1249 CE
- Sasanian Empire · 224 – 651 · Yazdegerd I, emperor of the Sasanian Empire since 399
- Persian Empire · 550 BCE – 1979 CE · Yazdegerd I, emperor of the Sasanian Empire since 399
- Kingdom of Aksum · 401 BCE – 960 CE
- Ghana Empire · 100 – 1200
- Kingdom of Iberia · 299 BCE – 580 CE
- Caucasian Albania · 2 BCE – 461 CE
- Kingdom of Armenia · 553 BCE – 428 CE · Vramshapuh, monarch since 389
and 12 more; every state of Middle East and North Africa.
South Asia25 states
- Gupta Empire · 320 – 550 · Chandragupta II, Gupta emperor since 380
- Chola dynasty · 300 BCE – 1279 CE
- Gandhara · 751 BCE – 535 CE
- Indo-Scythian Kingdom · 200 BCE – 400 CE
- Pallava dynasty · 275 – 897
- Pandya dynasty · 300 BCE – 1650 CE
- Kingdom of Khotan · 56 – 1006
- Wusun · 170 BCE – 450 CE
- Vakataka dynasty · 250 – 500
- Western Ganga dynasty · 350 – 1000
and 15 more; every state of South Asia.
East and Southeast Asia28 states
- Xiongnu · 301 BCE – 500 CE
- Jin dynasty (266–420) · 266 – 420
- Silla · 57 BCE – 892 CE
- Goguryeo · 37 BCE – 668 CE · Gwanggaeto the Great, wang since 391
- Champa · 192 – 1832 · Bhadravarman I, king since 380
- Paekche · 18 BCE – 660 CE · Asin of Paekche, king since 392
- Rouran Khaganate · 330 – 555
- Xianbei · 208 BCE – 670 CE
- Pyu city-states · 201 BCE – 1050 CE
- Kaya confederacy · 42 – 562
and 18 more; every state of East and Southeast Asia.
Americas and Oceania5 states
- Maya civilization · 2001 BCE – 1521 CE
- Teotihuacan · 50 BCE – 704 CE
- Zapotec civilization · 6701 BCE – 1201 CE
- Tiwanaku polity · 300 – 1150
- United Provinces of New Granada · 181 – 1816
Location unknown21 states
- Eastern Ye · 301 BCE – 500 CE
- Southern Liang · 397 – 414 · Tufa Lilugu, Emperor of China since 399
- Alchon Huns · 380 – 560
- Langkasuka · 100 – 1500
- Licchavis of Nepal · 400 – 750
- Geumgwan Gaya · 43 – 532
- Oddiyana · 401 BCE – 1100 CE
- Varman dynasty · 350 – 655
- Daegaya · 42 – 562
- Shanshan · 92 BCE – 445 CE
and 11 more; every state of Location unknown.
Open in the atlas
- On the timeline, 375 – 425: every state, war and life of 400 and the years either side, region by region.
- On the map in 400: the borders of the year, its cities under their names of the year, and what happened where.
Wikidata (CC0) · data built 2026-10-07 · Pastlas v2.13.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.