What historical events are reflected in the legends of King Arthur?

King Arthur was a legendary person and it cannot be said that he really existed, like his mentor, the sorcerer Merlin. True, for the history of England, Arthur plays a significant role, since, according to legend, he ruled in very difficult times for the English people. Surely we can say that the events that are reflected in the legend of Arthur show the period when the Roman Empire began to lose its power and was removed from Britain in the 4th century AD. At that time, there was a fierce struggle for territory throughout Britain. The main opponents of the British tribes (Picts and Scots) were the Saxons, who moved from the north.