In a military point of view, too, the alliance of France was most valuable to the contiguous Netherlands. A few regiments of French troops, under the command of one of their experienced Marshals, could block up the Spaniards in the Walloon Provinces, effectually stop their operations against Ghent, Antwerp, and the other great cities of Flanders and Brabant, and, with the combined action of the United Provinces on the north, so surround and cripple the forces of Parma, as to reduce the power of Philip, after a few vigorous and well-concerted blows, to an absolute nullity in, the Low Countries. As this result was of as vital importance to the real interests of France and of Europe, whether Protestant or Catholic, as it was to the Provinces, and as the French government had privately manifested a strong desire to oppose the progress of Spain towards universal empire, it was not surprising that the States General, not feeling capable of standing alone, should make their application to France. This they had done with the knowledge and concurrence of the English government. What lay upon the surface the Netherland statesmen saw and pondered well. What lurked beneath, they surmised as shrewdly as they could, but it was impossible, with plummet and fathom-line ever in hand, to sound the way with perfect accuracy, where the quicksands were ever shifting, and the depth or shallowness of the course perpetually varying. It was not easy to discover the intentions of a government which did not know its own intentions, and whose changing policy was controlled by so many hidden currents.