Mbh 12.102.2b

They whose array blazes forth with splendour and becomes terrible to look at in consequence of the sheen of their weapons, machines, armour, and standards as also of the radiant complexion of the faces of the vigorous men that stand within it, always succeed in vanquishing their foes. If the combatants of a host be of pure behaviour and modest deportment and attend to one another in loving-kindness, that is regarded as an indication of future success. If agreeable sounds and odors and sensations of touch prevail, and if the combatants become inspired with gratitude and patience, that is regarded as the root of success. The crow on the left of a person engaged in battle and on the right of him who is about to engage in it, is regarded auspicious. Appearing at the back, it indicates non-fulfilment of the objects in view, while its appearance in the front forebodes danger. Even after enlisting a large army consisting of the four kinds of forces, thou shouldst, O Yudhishthira, first behave peacefully. If thy endeavours after peace fail, then mayst thou engage in battle. The victory, O Bharata, that one acquired by battle is very inferior. Victory in battle, it seems, is dependent on caprice or destiny. When a large army breaks and the troops begin to fly away, it is exceedingly difficult to check their flight. The impetuosity of the flight resembles that of a mighty current of water or of a frightened herd of deer. Some have broken. For this, without adequate cause, others break, even they that are brave and skilled in fight. A large army, consisting of even brave soldiers, is like a large herd of Ruru deer.[305] Sometimes again it may be seen that even fifty men, resolute and relying upon one another, cheerful and prepared to lay down their lives, succeed in grinding enemies numerically much superior.