Originally posted by: AnjanaYYZ
Yeah - Bhisma kidnaped Ambi for his brother. But, she refused to marry Bhisma's bro cuz she had a BF. Bhisma sent her back to her BF. But, her BF bounced her back to Bhisma. Bhisma then rejected Ambika. Amby got pissed about the rejection from Bhisma and vowed to be the reason for his demise.
Some janams later Amby was born as Shikandi, Drupad's son (bro of Draupadi). Bhisma new it was really Amby and he refused to fight a girl. Arjun shot arrows at Bhisma to defeat him with Shikandi at his side. Bhisma refusing to fight for that reason.
Sikhandi thus became the wajah of Bhisma's defeat n death.