Plato is writing about Critias telling Socrates a story by his grandfather (also Critias) who heard it from Solon, who heard it from an Egyptian priest:[*]
Many great and wonderful deeds are recorded of your Athenian state in our histories. But one of them exceeds all the rest. For these histories tell of a mighty power which unprovoked made an expedition against the whole of Europe and Asia, and to which your city put an end. This power came from the Atlantic Ocean.
There was an island situated in front of the straits which are by you called the Pillars of Heracles; the island was larger than Libya and Asia put together, and was the way to other islands, and from these you might pass to the whole of the opposite continent which surrounded the true ocean.
Now in this island of Atlantis there was a great and wonderful empire which had rule over the whole island and several others, and, furthermore, the men of Atlantis had subjected Libya within the columns of Heracles as far as Egypt, and Europe as far as Tyrrhenia.
This vast power, gathered into one, endeavoured to subdue at a blow our country and yours and the whole of the region within the straits; and then, Solon, your country shone forth, in the excellence of her virtue and strength, among all mankind. She was pre-eminent in courage and military skill, and was the leader of the Hellenes. And when the rest fell off from her, being compelled to stand alone, after having undergone the very extremity of danger, she defeated and triumphed over the invaders, and preserved from slavery those who were not yet subjugated, and generously liberated all the rest of us who dwell within the pillars.
But afterwards there occurred violent earthquakes and floods; and in a single day and night of misfortune all your warlike men in a body sank into the earth, and the island of Atlantis in like manner disappeared in the depths of the sea. For which reason the sea in those parts is impassable and impenetrable, because there is a shoal of mud in the way; and this was caused by the subsidence of the island.
[Plato, ‘Timaeus’, Collected Dialogues, pp. 1159-60]
mighty power from the Atlantic Ocean
(see >End-times: Prophecies of 9/11)