Alexander

This, however, is the story of Onesicritus; Alexander himself says that they left their rafts and crossed the breach with their armour on, wading breast-high in water, and that after he had crossed he led his horsemen twenty furlongs in advance of his infantry, calculating that, in case the enemy attacked with their cavalry, he would be far superior to them, and in case they moved up their men-at-arms, his infantry would join him in good season. And one of these suppositions came to pass.