So begins the Mascaro translation of the Bhagavad Gita. Many are inclined to skip over this portion of the text due to its expository nature, but there are points to be made in it.
This is a tale told by Sanjaya to Dhritarashtra, whose sons are at war with the sons of his own brother, Pandu. First, Dritarashtra's son Duryodhana describes the opposing forces, including the legendary archer Arjuna and his own son Saubhadra. We learn that Arjuna is Pandu's son, and therefore Dhritarashra's nephew. They are all intimately realted.
There is a colorful description of war cries, the sounds of conch shells and mustering of forces. It is in this atmosphere that we find Arjuna and Krishna, Lord of the Soul, ready to begin the battle.
These are the things to be noted if reading the text literally. But remember that we are on the field of Truth, on the battlefield of life. Arjuna is also girding himself to battle his own self. He sees treasured parts of himself on both sides of the battlefield, things he likes and dislikes but is equally unable to set aside This is the ultimate battle - the battle for the inner self. He goes forward with great confidence, sounding his horn, in the manner of a great and powerful man.