Bhishma is said to have defeated Parshuram, when the latter had promised to help Amba. How was he able to do so with Parshuram still in possession of sudarshan chakra (which he eventually gives to Krishna)?
Mahabharata (Hindu epic): Was Bheeshma being unloyal to Duryodhana when he refused to kill any of the pandavas and further assisted pandavas on how to defeat him in order to break the war stalemate.. Didn't he vow that he would serve whoever sits on the King's throne?