PastlasHistorical atlas

Decade · 840 – 849

The world in the 840s

From 840 to 849 the atlas holds 225 states standing at some time. 26 things began - Hungarians, Treaty of Verdun and West Francia among them - and 8 ended; 30 people were born and 25 died, 3 of all these dated only to the decade.

Its years

The years of the decade with a page of their own: ten or more things dated to the year.

840: 2 began — 0 wars and battles, 0 risings, regime changes and massacres, 2 other840841: 3 began — 1 wars and battles, 1 risings, regime changes and massacres, 1 other841842: 0 began — 0 wars and battles, 0 risings, regime changes and massacres, 0 other842843: 5 began — 0 wars and battles, 0 risings, regime changes and massacres, 5 other843844: 4 began — 4 wars and battles, 0 risings, regime changes and massacres, 0 other844845: 2 began — 2 wars and battles, 0 risings, regime changes and massacres, 0 other845846: 2 began — 1 wars and battles, 0 risings, regime changes and massacres, 1 other846847: 3 began — 0 wars and battles, 0 risings, regime changes and massacres, 3 other847848: 2 began — 0 wars and battles, 0 risings, regime changes and massacres, 2 other848849: 2 began — 1 wars and battles, 0 risings, regime changes and massacres, 1 other849

What began in the 840s

By kind, the best known first.

States 14

and 6 more in the atlas.

Wars and battles 9

and 1 more in the atlas.

Unrest and atrocity 1

Natural disasters 1

Treaties 1

What ended in the 840s

States 7

Unrest and atrocity 1

Born and died

Born 30

and 14 more in the atlas.

Died 25

and 9 more in the atlas.

States of the 840s

The states that stood at some time in the 840s, by region, the best known first, with who held the highest office in 840.

Europe: 106 statesEurope106Middle East and North Africa: 29 statesMiddle East and North Africa29South Asia: 34 statesSouth Asia34East and Southeast Asia: 28 statesEast and Southeast Asia28Americas and Oceania: 10 statesAmericas and Oceania10Location unknown: 18 statesLocation unknown18

Europe106 states

and 98 more; every state of Europe.

Middle East and North Africa29 states

and 21 more; every state of Middle East and North Africa.

South Asia34 states

and 26 more; every state of South Asia.

East and Southeast Asia28 states

and 20 more; every state of East and Southeast Asia.

Americas and Oceania10 states

and 2 more; every state of Americas and Oceania.

Location unknown18 states

and 10 more; every state of Location unknown.

Open in the atlas

  • On the timeline, 820 – 869: every state, war and life of the 840s, region by region.
  • On the map in 845: 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.