Suddenly and without orders 800 of Maurice's cavalry galloped off to meet the enemy; but they soon came back again at full speed, with a strong force of Spanish cavalry in pursuit. Vere's infantry at once sallied out from their ambush among the trees, poured their fire into the enemy, and charged them with their pikes. The Spaniards turned to fly, when Vere's cavalry charged them furiously and drove them back in headlong rout to their own camp, taking a great number of prisoners, among them many officers of rank, and 500 horses. Parma finding himself thus suddenly in face of a superior army, with a rapid river in his rear, fell back across the Waal, and then proceeded to Spa to recruit his shattered health, leaving Verdugo, an experienced officer, in command. Instead of proceeding to besiege Nymegen, Maurice marched away as suddenly and quickly as before, and captured Hulst, on the borders of Zeeland and Brabant, a dozen miles only from Antwerp, and then turning again was, in three days, back at Nymegen, and had placed sixty-eight pieces of artillery in position. He opened fire on the 20th of October, and the next day the important city of Nymegen surrendered. This series of brilliant successes greatly raised the spirits of the Netherlanders, and proportionately depressed those of the Spaniards and their adherents. Parma himself was ill from annoyance and disappointment. The army with which he might have completed the conquest of the Netherlands had, in opposition to his entreaties and prayers, been frittered away by Philip's orders in useless expeditions in France, while the young and active generals of the Dutch and English armies were snatching town after town from his grasp, and consolidating the Netherlands, so recently broken up by Spanish strongholds, into a compact body, whose increasing wealth and importance rendered it every day a more formidable opponent. It is true that Parma had saved first Paris and afterwards Rouen for the League, but it was at the cost of loosening Philip's hold over the most important outpost of the Spanish dominions. In the following spring Parma was again forced to march into France with 20,000 men, and Maurice, as soon as the force started, prepared to take advantage of its absence. With 6000 foot and 2000 horse he again appeared at the end of May before Steenwyk. This town was the key to the province of Drenthe, and one of the safeguards of Friesland; it was considered one of the strongest fortresses of the time. Its garrison consisted of sixteen companies of foot and some cavalry, and 1200 Walloon infantry, commanded by Lewis, the youngest of the Counts de Berg, a brave lad of eighteen years of age.