Towards the middle of May, as Charles Emmanuel had as yet taken no steps to carry out his engagements, Henri IV began moving troops towards the frontier of Savoy, and he himself, accompanied by a few of his intimates, amongst whom was Bassompierre, set out for Lyons, having sent the rest of the Court on in advance to await him at Moulins. At Moulins, where he was the guest of Queen Louise, widow of the late King, he stayed for some little time “principally on account of la Bourdaisière, with whom he was in love”[32]; and it was not until the beginning of July that he arrived at Lyons. Here he remained three weeks, to see what action Charles Emmanuel proposed to take. That prince, however, had signed the treaty of February merely for the purpose of gaining time; and the promises of Spain, which feared, above all things, to see France once more in possession of Saluzzo, decided him to break his word. At the expiration of the three months he solicited a further delay or an amelioration of the conditions of the treaty, hoping that the expected rebellion of the Maréchal de Biron and the Comte d’Auvergne, whom, by specious promises, he had succeeded in seducing from their allegiance to their sovereign, would break out before Henri IV was ready to take the field. Henri IV, however, was not deceived, and summoned the Duke to declare immediately what his intentions were. The latter, after many tergiversations, announced that he was prepared to surrender Saluzzo. But when the King despatched officers to take possession of the chief places in the marquisate, he refused to surrender them; and on August 11, Henri IV, at the end of his patience, declared war at Lyons. Bassompierre has left us an interesting account of the campaign which followed--a campaign of invasion undertaken by an army scarcely more numerous than a brigade to-day; but which, thanks to the improvements in the artillery which Sully had introduced and the valour of the troops, proved entirely successful. He himself underwent his “baptism of fire” at the taking of the town of Montmélian, where he served with the regiment of the Sire (afterwards the Maréchal) de Créquy. His military career came very near to ending as well as beginning at Montmélian, for, in the darkness, he lost his way and was cut off from his comrades, “so that I was for more than an hour at the mercy of the fire from the citadel, at twenty paces from the ditch.” By what seems like a miracle, however, he was not hit, and, at length a sergeant, whom Créquy had sent to find him, arrived and guided him to a place of safety.