W. Lloyd Bevan, The world's leading conquerors
“ The battle of Pharsalus is the only one in which it is certain that he won a victory with an army inferior in numbers to his opponent. In this case nothing else could have been done, for Pompeius, who was in control of the sea, would have removed his army from Greece if he had been outnumbered. There was but one way of forcing a pitched battle under these circumstances, and it was part of superior strategy to induce an enemy relying on superior numbers to confront troops superior in quality. But such chances Cæsar only took when obliged. ”
