What were the consequences of the Dorian conquest?

In the 12th century BC, the ancient Cretan-Mycenaean civilization was dominant on the territory of the Balkan Peninsula, the center of which was the city of Mycenae. True, in the same period from the north, the Dorian tribes invaded these territories, which served as the main reason for the disappearance of the Mycenaean civilization. So the Dorians, who later turned into Hellenes, became the dominant chain in this region.