You must support and protect Bhishma at all costs, at the strategic points of our battle formation.
Bhagavad Gita - Chapter 1 - Sainya Darshana - Observing the Armies on the Battlefield
Then Bhishma, the fearless grandsire of the Kuru Dynasty, roaring like a lion, blew his conch loudly to increase the euphoria of Duryodhana.
At that point, conches, trumpets, bugles, drums and horns suddenly sounded all at once and the combined sound rose up like thunder.
On the other side of the battlefield, both Shri Krishna, the husband of the Goddess of wealth, and Arjuna, sitting on a wonderful chariot yoked with horses of fair hue, blew their divine conches.
Shri Krishna, the Master of the senses, blew his conch-shell called Pancajanya. Arjuna, the winner of great wealth, blew his conch-shell called Devadatta. Bhima, the performer of great feats, blew his conch-shell Paundra.
Yudhishthira, the son of Kunti, blew his conch-shell Ananta-vijaya. Nakula and Sahadeva blew their conches called Sughosha and Manipushpaka. O emperor, the great archer the king of Kashi, the expert chariot warrior Shikhandi, Dhrishtadyumna, Virata, the invincible Satyaki, Drupada, the sons of Draupadi and Abhimanyu the mighty son of Subhadra all blew their conches.
The hearts of the sons of Dhritarashtra were shattered as the tumultuous sound reverberated throughout the sky and on the land.
Speaking to Dhritarashtra, Sanjaya said: O emperor, just as the war was about to commence, Arjuna, whose chariot was decorated with the banner of Hanuman, observing your sons poised for battle, took up his bow and spoke to Hrishikesha (Shri Krishna, the Master of the senses), as follows.
Arjuna said: O infallible One (Acyuta), place my chariot between both armies so that I may look upon the soldiers that I must do battle with.
Let me see all those warriors that are dear to Duryodhana, the wicked son of Dhritarashtra, assembled here for this battle.