Drona in Command:
Drona takes command of Duryodhana's armies
He vows to make Yudhishthira his prisoner
Arjuna vows to defend his brother even at the cost of his own life.
Death of Drona:
-As long as Ashwatthaman lived it came to be believed that his father would never be conquered
- Bhima, therefore, being bent on the defeat of Drona, selected an elephant named Ashwatthaman and slew it with his own hands and then threw himself in his might on the Kuru front in the neighborhood of Drona, shouting, "Ashwatthaman is dead!
-Drona heard the words, and for the first time his stout heart sank.
-He would not believe it unless it was undeniably confirmed by Yudhishthira
-Making his way to Yudhishthira, Drona asked him for the truth, and Yudhishthira answered yes
-Then Drona, in his despair for the loss of his son, became unable to think of his divine weapons.
- Dhrishtadyumna, the Pandava general, had seized his sword and leapt to the ground in order to attack Drona in personal combat.
The Night Raid:
When night fell, the dying Duryodhana was visited on the battlefield by Ashwatthaman, son of Drona, and Kripa, and Kritavarman.
Ashwatthaman was given permission to attack the Pandavas while yet they slumbered
Drona's son went forth in the darkness to glut his hunger for vengeance because that his sire had been slain
At the gate of the Pandava camp an awful figure rose up against the conspirators
Bibliography: Mahabharata, Epic of the Bharatas, by Romesh C. Dutt, Myths of the Hindus and Buddhists by Sister Nivedita, Indian Myth and Legend by Donald A. Mackenzie