How did the unification of France end, the consequences and the unification?

After the collapse of Charlemagne’s empire, the Frankish kingdom itself was greatly weakened. The king’s possessions were limited to his own feudal domain. Some dukes and earls had more land than he did. However, after the 11th century, French kings tried to unite the lands under their control, relying on small and medium feudal lords. So Philip 2 was able to achieve great successes in uniting the country. He won Normandy from the British and annexed the Toulouse County. Under Philip 4, the unification of the country continued. True, then a major war began with England, thus France for a whole century again turned into a fragmented state.