Now comes the Kaurava roll call. Duryodhana names seven pillars of his army: Drona himself, Bhishma, Karna, Kripacharya, Ashvatthama, Vikarna, and Bhurishrava. These are formidable names, each one a legend of the Mahabharata.
Bhishma had the boon of choosing his own moment of death. Karna, the son of Surya, was an archer equal to Arjuna. Kripacharya is considered immortal (chiranjeevi). Ashvatthama, Drona's own son, was an immensely powerful warrior. Any one of them could change the course of a battle.
Duryodhana places Drona first in the list with the word "Bhavan" (yourself). It is a shrewd piece of flattery: "You are our greatest strength." This is the language of a leader working to fire up his generals before the fight begins.