West Franks

State · 850–989 CE · at its largest around 886 CE

West Francia, the western kingdom created at Verdun in 843 for Charles the Bald, which developed into the Kingdom of France.

On its lands while it lasted

Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Alfred the Great (849 CE – 899 CE): King of Wessex who defended his kingdom against the Vikings, reorganised its defences and promoted learning in English.
Sibenik (860 CE): Capital of Kingdom of Croatia (926–1098).
Brunswick (861 CE): Capital of Duchy of Brunswick (1815–1870).
Mission of Cyril and Methodius (863 CE): Byzantine brothers sent as missionaries to Great Moravia, who created the Glagolitic alphabet and translated the liturgy into Old Church Slavonic.
Great Heathen Army (865–878 CE): A large coalition of Scandinavian warriors landed in East Anglia in 865, took York, and conquered Northumbria, East Anglia and much of Mercia before Alfred the Great defeated Guthrum at Edington in 878.
Burgos (884 CE): Capital of Kingdom of Castile (1065–1235).
Hungarian conquest (c. 895 CE): Magyar tribes led by Árpád crossed the Carpathians and settled the Pannonian Basin, laying the foundation of the Hungarian state.
Székesfehérvár (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1000–1543).
Esztergom (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1001–1256).
Andorra la Vella (900 CE): Capital of Principality of Andorra (1815–today).
Bratislava (907 CE): Capital of Kingdom of Hungary (1526–1546).
Lugo (c. 911 CE): Capital of Kingdom of Galicia (911–1125).
Regensburg (c. 911 CE): Capital of Kingdom of Germany (911–961), Holy Roman Empire (1594–1806), Holy Roman Empire Minor States (1594–1806), and 1 more.
Founding of the Holy Roman Empire (962 CE): Pope John XII crowned Otto I emperor in Rome, the conventional start of the Holy Roman Empire, which lasted until 1806.