Thucydides offers this explanation for Harmodios and Aristogeiton's actions in Book VI: Hipparchus was rejected by Harmodius, for whom he had unrequited feelings. Hipparchus invited Harmodius' young sister to be the kanephoros (to carry the ceremonial offering basket) at the Panathenaea festival, then publicly chased her away on the pretext she was not a virgin, as required. This publicly shamed Harmodius' family. With his lover Aristogeiton, Harmodius resolved to assassinate both Hippias and Hipparchus and thus to overthrow the tyranny. Harmodios and Aristogeiton successfully killed Hipparchus during the 514 BC Panathenaia, but Hippias survived and remained in power. In the four years between Hipparchus' assassination and the deposition of the Pisistratids, Hippias became an increasingly oppressive tyrant.