Theseus, Aegeus, and the Labyrinth

While Theseus was thus first fighting for his subjects, and then quarreling with them, one of his companions, the hero Hercules (or Heracles) went back to the Peloponnesus, where he had been born. There his descendants, the Heraclidae, soon began fighting with the Pelopidae for the possession of the land.

After much warfare, the Heraclidae were driven away, and banished to Thessaly, where they were allowed to remain only upon condition that they would not attempt to renew their quarrel with the Pelopidae for a hundred years.

From: H. A. Guerber, The Story of the Greeks; edited for this online publication, by ELLOPOS BLOG