Concentration on occupied positions, in camps and forests; holding the ropes (of beasts and other things) while crossing the rivers or when the wind is blowing hard; destruction or protection of the commissariat and of troops arriving afresh; supervision of the discipline of the army; lengthening the line of the army; protecting the sides of the army; first attack; dispersion (of the enemy's army); trampling it down; defence; seizing; letting it out; causing the army to take a different direction; carrying the treasury and the princes; falling against the rear of the enemy; chasing the timid; pursuit; and concentration--these constitute the work of horses.