The whole of the Protestant party became filled with mistrust; and observing this, Catherine de Medicis determined to strike her blow at once. It was difficult, of course, to raise troops without alarming the Huguenots. But it so chanced that an army sent by the King of Spain to the Low Countries was then marching along the French frontiers. As if apprehensive for the safety of her dominions, Catherine raised 6,000 Swiss troops, and after the Spaniards had passed towards their destination, marched them to the centre of the kingdom. Everything seemed to favour Catherine's designs. But someone having informed the Calvinists of the peril which threatened them, they assembled in the house of the admiral at Châtillon, and there resolved to seize upon the Court, which was enjoying the fine weather at Monceau, in Brie, without the least precaution for its own safety; as though it had nothing to fear from that body of men whose destruction it notoriously meditated. The design of the Protestants was to drive away the Guises, and place the king and queen at the head of their own party. The attempt, however, failed through the firm attitude of the Swiss troops, who repulsed the attack of Andelot and La Rochefoucauld, and brought the king from Meaux to Paris surrounded by a strong battalion. The war began again, and the Calvinists, commanded by the Prince de Condé, were defeated, the prince himself being slain, or rather assassinated, during the conflict. He had just surrendered to Dargence, when Montesquieu, captain of the Duke of Anjou's guard, on learning who he was, shot him in the head, exclaiming, "Tuez! Tuez, Mordieu!"