Arjun said, “Krishna, I will not be a part of this battle.”
Krishna had the power to destroy the opposite army in blink of an eye. He explained Arjun, “It is not about politics, revenge or power, or your cousins, your father like uncles or the innocent army-men who are following orders, their wives and children, or the animals or about yourself and your brothers. It is about doing right in a manner that is righteous (Dharma).”
It wasn’t Krishna’s battle, it was Arjun’s. He had to fight on his own. Krishna was his charioteer, his guide and support. Krishna was Arjun’s friend.