Was Bhishma ever defeated?

Was Bhishma ever defeated? Bhishma was one of the most formidable warrior of Mahabharata. But still its a myth that Bhishma was undefeated warrior. Arjuna, Satyaki, Bhima, Ghatotkacha and Pradyumna had defeated Bhishma. Defeat by Satyaki: And Satyaki then from desire of doing what was agreeable to Bhima, felled with his shaft the charioteer of the reverend Kuru grand-sire. Upon his charioteer being slain, that foremost of car-warriors, Bhishma, was borne away from the field of battle by his steeds with the speed of the wind.[1] Analysis: On second day of the Kurukshetra war, Satyaki approached Bhishma and killed Bhishma's chariot driver. The horses went out of control which carried Bhishma to another part of the battlefield. This is how Satyaki prevailed over Bhishma. Defeat by Bhima: Indeed, Bhima alone, approaching Bhishma, encountered him in battle. Then in that encounter between Bhima and Bhishma, a fierce and terrible uproar arose among all the troops (of the Kauravas). The Pandavas then, filled with joy, uttered leonine shouts. During that destructive carnage, king Duryodhana, surrounded by his uterine brothers, protected Bhishma in that battle. Then that foremost of car-warriors, viz., Bhima, slew Bhishma's charioteer. Thereupon the steeds no longer controlled, ran away from the field with car.[2] Analysis: On the eighth day of Kurukshetra battle, Bhima approached Bhishma and killed the charioteer of Bhishma's chariot. Therefore horses went out of control which took Bhishma away from Bhima and went to a different part of the battlefield. Defeat by Ghatotkacha: Hearing these words of Bhishma, all the kings (of the Kuru army), headed by Bharadwaja's son, desirous of rescuing Bhagadatta, proceeded with great speed to where the ruler of the Pragjyotishas was. And beholding the enemy advancing, the Panchalas with the Pandavas, headed by Yudhishthira, pursued them behind. Then that prince of Rakshasas, endued with great prowess, beholding that division (of the enemy) advance, uttered a fierce roar, deep as that of thunder. Hearing that roar of his and beholding those battling elephants, Santanu's son Bhishma once again addressed Bharadwaja's son and said, 'I do not like to fight (to-day) with the wicked-souled son of Hidimva. Endued with great might and energy, he is at present well-supported. He is incapable of being vanquished now by the wielder of the thunder-bolt himself. Of sureness of aim, he is a great smiter. As regards ourselves, our animals are tired (today). We have also been greatly mangled by Panchalas and the Pandavas. I do not like fresh encounter with the victorious Pandavas. Let the withdrawal of our army, therefore, be proclaimed today. Tomorrow we will fight with the foe.' Hearing these words of the grandsire, the Kauravas, afflicted with the fear of Ghatotkacha, and availing of the advent of night as a pretext, gladly did what the grandsire said. And after the Kauravas had withdrawn, the Pandavas, crowned with victory uttered leonine roars, mingling them with the blare of conches and the notes of pipes.[3] Analysis: On fourth day of Kurukshetra war, Ghatotkacha was on a rampage. He was about to kill Bhagadatta. This is when Bhishma and Drona went to the rescue of Bhagadatta. Upon hearing the terrible roar of Ghatotkacha, Bhishma got frightened and ordered his troops to withdraw. Defeat by Pradyumna: the powerful son of kR^iShNa, (pradyumna), at the front of the battle, oppressed karNa who was trying hard for victory in the battlefield and caught him, who was struggling. O king! (janamejaya! vaishampAyana continued) and threw him into the terrible cave of illusion. In the same way (he caught) king duryodhana, virATa, drupada, shakuni, and shalya, nIla and also the son of the river (bhIShma), the kings vinda and anuvinda as well as jarAsaMdha[4] Analysis: The above quote is from Harivamsha. Pradyumna captured Bhishma along with other famous warriors. Pradyumna tied Duryodhana, Virata, Drupada, Shakuni, Shalya, King Nila, Bhishma and Karna with a divine rope that he had received from Shiva and threw them in a cave of illusion.