At Poitiers the Franks fought as they had done two hundred years before at Casilinum, in one solid mass, without breaking rank or attempting to maneuver. Their victory was won by the purely defensive tactics of the infantry square; the fanatical Arabs, dashing against them time after time, were shattered to pieces, and at last, fled under the shelter of night. But there was no pursuit, for Charles had determined not to allow his men to stir a step from the line to chase the broken foe.