The western portion of the Carolingian Empire after the Treaty of Verdun (843), which evolved into the Kingdom of France by 987 under the Capetian dynasty.
Transformed into the Kingdom of France in 987 when Hugh Capet was elected king after the last Carolingian ruler Louis V died without an heir, establishing the Capetian dynasty.
Covers the Carolingian successor states including West Francia — verified via Open Library.
Primary source: Nithard, a grandson of Charlemagne, gives a contemporary account of the partition that produced West Francia, the nucleus of the kingdom of France (primary source).
Era survey tracing West Francia's emergence from the Carolingian partition toward the Capetian kingdom of France (era/regional context).