Bhagavad Gita Chapter 1, Verse 3

पश्यैतां पाण्डुपुत्राणामाचार्य महतीं चमूम् | व्यूढां द्रुपदपुत्रेण तव शिष्येण धीमता ||

paśyaitāṁ pāṇḍu-putrāṇām ācārya mahatīṁ camūm vyūḍhāṁ drupada-putreṇa tava śiṣyeṇa dhīmatā

Behold! this mighty host of the sons of Pandu, arrayed by the son of Drupada, thy wise disciple!

Duryodhana opens by pointing Drona's attention to the Pandava army—specifically noting it was arranged by Dhrishtadyumna, Drona's own student. This isn't just observation; it's manipulation. He's reminding Drona that the enemy's strategy comes from someone he trained, subtly stirring guilt or questioning loyalty. It's the psychology of insecurity: when threatened, people weaponize guilt to make others feel responsible for their challenges.