To drive back the invading forces the Perumal summoned the militia of his chieftains (like Udaya Varman Kolathiri, Manichchan, and Vikkiran of Eranad). The Cheraman Perumal was assured by the Eradis (chief of Eranad) that they would take a fort established by the Rayar.[25] The battle lasted for three days and the Rayar eventually evacuated his fort (and it was seized by the Perumal's troops).[25] Then the last Cheraman Perumal divided Kerala or Chera kingdom among his chieftains and disappeared mysteriously.