Of course, Arjuna did not ask him. Arjuna was satisfied with Kṛṣṇa. That's all. Kṛṣṇa also divided Himself. Because it is family quarrel. So He said, "I cannot take part with anyone and even if I take part, side, of any of you, I shall not fight. Directly I shall not fight. I may be on your side or that side, but I'll not fight." Still, Arjuna was satisfied. So Kṛṣṇa, in order to satisfy Arjuna, that "I shall not fight, but I shall become your charioteer. I shall drive your chariot." So in this way the battle was arranged, and when Dhṛtarāṣṭra inquired, kim akurvata sañjaya (BG 1.1), "What did they do?" He said, "Sir, don't be disappointed. There was no compromise. Immediately your son, after seeing the military arrangement of the Pāṇḍavas, he was surprised, and immediately he went to Dronācārya." He is the commander-in-chief appointed first. "What to do?" Rājā vacanam abravīt (BG 1.2). Then he began to speak, to inform Dronācārya. So next verse.
Pradyumna: (leads chanting, etc.)
- paśyaitāṁ pāṇḍu-putrāṇām
- ācārya mahatiṁ camūm
- vyūḍhāṁ drupada-putreṇa
- tava śiṣyeṇa dhīmatā
- (BG 1.3)
Translation: "O my teacher, behold the great army of the sons of Pāṇḍu, so expertly arranged by your intelligent disciple, the son of Drupada."
Prabhupāda: So—intelligent. This Drupada, the son of Drupada, he was meant for killing Dronācārya. Drupada Mahārāja was not in good terms with Dronācārya. So he performed a yajña to get a son who could kill Dronācārya. That son is this Draupada. So Dronācārya knew that "Drupada Mahārāja has got his son. In future he would kill me." Still, when he was offered to become his disciple, to learn military art, he accepted, "Yes." That means the brāhmaṇas were so liberal: "When he is coming as my disciple, never mind, he would kill me in future. That doesn't matter. But I must give him teaching." Therefore this word is used, dhīmatā, very intelligent: "He has killed the military science from you just to kill you." Dhīmatā, tava śiṣyeṇa. "Your disciple, he has arranged." This is the pointing out. So that he may be angry: "This rascal has learned from me and he wants to kill me?"
But no. Duty is duty. After all, everyone will die; nobody will exist. So nobody should be afraid of death. This is Vedic civilization. Death is inevitable. "As sure as death." Who can avoid death? So being afraid of death, we should not deviate from our duties, real duty. That is Vedic civilization. So Duryodhana wanted to point out "That this boy, your disciple, he... It is fixed up that he's meant for killing you, and he has arranged nicely military phalanx just to defeat you. And he has learned this art from you."