By the 10th century , Kandalur and Vizhinjam became Chera strongholds .
After the death of Vikramaditya Varaguna the glory of the Ays departed and lost their territories to neighbouring powers such as the Cheras .
By the 10th century , Kandalur and Vizhinjam became Cheras strongholds .
After the death of Vikramaditya Varaguna the glory of the Ays departed and lost their territories to neighbouring powers such as the Cheras .