The plot – to be carried out by means of daggers hidden in the ceremonial myrtle wreaths on the occasion of the Panathenaic Games – involved a number of other co-conspirators. Thucydides claims that this day was chosen because during the Panathenaic festival, it was customary for the citizens taking part in the procession to go armed, while carrying weapons on any other day would have been suspicious. Aristotle disagrees, asserting that the custom of bearing weapons was introduced later, by the democracy.