In an epic saga like the Mahabharata, two mythical families destroying each other is certainly a major event, and it is no exception here.
Krishna decides that he will give his armies to the Kauravas, but he himself will help the Pandavas. Krishna is Vishnu, the king of the gods incarnate, so it’s probably a good thing for the Pandavas that he’s on their side.
The Kauravas and the Pandavas go to war for 18 days. Bhisma is commanding the army against the Pandavas. The Pandavas love Bhisma like a father. Arjuna, the great bowman, does not want to kill his beloved uncle.
This is the point in the battle during which Krishna takes time out to deliver the Bhagavad Gita to Arjuna. The Bhagavad Gita summarizes Hindu theology. Krishna convinces Arjuna that human life is ephemeral, and it is better for him to act than to not act. Arjuna, seeing the tapestry of existence in a wider way now, decides he can fight Bhisma.
You might remember that Bhisma has vowed not to attack a woman. Shikhandi, who is a reincarnation of the princess Bhisma ruined the life of, is placed in Arjuna’s chariot, and from this cover, Arjuna fills Bhisma full of arrows.
Everyone is very sad, including the Pandavas. Bhisma is literally a pin cushion of arrows. Arjuna places 3 arrows under his head so he can rest. Bhisma is allowed to choose the time of his own death, and while he no longer the commander of the Kaurava forces, he lives until the war is finished. and then chooses to die.
Next up: Karna enters the battle.