Opposition

Both war and peace are opposites of each other. Because where there is war, there cannot be peace and where is peace there cannot be war. But in the battlefield of Kurukshetra, we found a confluence of these two. 

Where another side Kauravas and Pandavas are ready to fight each other. All Great warriors have gathered to do battle. But on the other side, we see Arjuna, who has become frightened to thinking of the bad consequences of this war and wants peace. Arjuna who has a war going on with different thoughts in his mind. He found peace by listening to the nectar of Shri Krishna's Gita.