The kingdom of Charles later became France, according to the treaty of Verdun when Charlemagne's empire was divided among his three grandsons. The Eastern Frankish kingdom,or the kingdom of Louis, eventually became Germany. The Western Frankish Kingdom, or the Kingdom of Charles, later became France, and the area in the center was called The Kingdom of Lothaire, where Belgium and Italy stand today.
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one of the other countries was the United Kingdom
Russia .
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France is a republic, not a kingdom. Economically it is largely
ahead of Spain.