He opened his first campaign early; and, by a display of clever manoeuvring, which threatened an attempt to force the French to raise the siege of La Fere, in the heart of Picardy, he concealed his real design—the capture of Calais; and he succeeded in its completion almost before it was suspected. The Spanish and Walloon troops, led on by Rone, a distinguished officer, carried the first defences: after nine days of siege the place was forced to surrender; and in a few more the citadel followed the example. The archduke soon after took the towns of Ardres and Hulst; and by prudently avoiding a battle, to which he was constantly provoked by Henry IV., who commanded the French army in person, he established his character for military talent of no ordinary degree.
He at the same time made overtures of reconciliation to the United Provinces, and hoped that the return of the Prince of Orange would be a means of effecting so desirable a purpose. But the Dutch were not to be deceived by the apparent sincerity of Spanish negotiation. They even doubted the sentiments of the Prince of Orange, whose attachments and principles bad been formed in so hated a school; and nothing passed between them and him but mutual civilities. They clearly evinced their disapprobation of his intended visit to Holland; and he consequently fixed his residence in Brussels, passing his life in an inglorious neutrality.
A naval expedition formed in this year by the English and Dutch against Cadiz, commanded by the earl of Essex, and Counts Louis and William of Nassau, cousins of Prince Maurice, was crowned with brilliant success, and somewhat consoled the provinces for the contemporary exploits of the archduke. But the following year opened with an affair which at once proved his unceasing activity, and added largely to the reputation of his rival, Prince Maurice. The former had detached the count of Varas, with about six thousand men, for the purpose of invading the province of Holland; but Maurice, with equal energy and superior talent, followed big movements, came up with him near Turnhout, on the 24th of January, 1597; and after a sharp action, of which the Dutch cavalry bore the whole brunt, Varas was killed, and his troops defeated with considerable loss.