County of Artois

State · 1241–1332 CE · at its largest around 1305 CE

County in northern France around Arras, granted by Louis IX to his brother Robert as an appanage.

On its lands while it lasted

Arras (c. 1241 CE): Capital of County of Artois (1241–1332).
Battle of the Golden Spurs (1302 CE): Flemish town militias defeated French knights at Kortrijk, showing that infantry could beat heavy cavalry.