Early in 1552 Maurice of Saxony struck his great blow at his master in the Tyrol, destroying in an instant all the Emperor's plans for the suppression of Lutheran opinions, and the reunion of Germany in a Catholic empire; and while Charles V. fled for his life, Henri II. with a splendid army crossed the frontiers of Lorraine. Anne de Montmorency, whose opposition to the war had been overborne by the Guises, who warmly desired to see a French predominance in Lorraine, was sent forward to reduce Metz, and quickly got that important city into his hands; Toul and Verdun soon opened their gates, and were secured in reality, if not in name, to France. Eager to undertake a protectorate of the Rhine, Henri II. tried also to lay hands on Strasburg; the citizens, however, resisted, and he had to withdraw; the same fate befell his troops in an attempt on Spires. Still, Metz and the line of the Vosges mountains formed a splendid acquisition for France. The French army, leaving strong garrisons in Lorraine, withdrew through Luxemburg and the northern frontier; its remaining exploits were few and mean, for the one gleam of good fortune enjoyed by Anne de Montmorency, who was unwise and arrogant, and a most inefficient commander, soon deserted him. Charles V., as soon as he could gather forces, laid siege to Metz, but, after nearly three months of late autumnal operations, was fain to break up and withdraw, baffled and with loss of half his army, across the Rhine. Though some success attended his arms on the northern frontier, it was of no permanent value; the loss of Metz, and the failure in the attempt to take it, proved to the worn-out Emperor that the day of his power and opportunity was past. The conclusions of the Diet of Augsburg in 1555 settled for half a century the struggle between Lutheran and Catholic, but settled it in a way not at all to his mind; for it was the safeguard of princely interests against his plans for an imperial unity. Weary of the losing strife, yearning for ease, ordered by his physicians to withdraw from active life, Charles in the course of 1555 and 1556 resigned all his great lordships and titles, leaving Philip his son to succeed him in Italy, the Netherlands, and Spain, and his brother Ferdinand of Austria to wear in his stead the imperial diadem. These great changes sundered awhile the interests of Austria from those of Spain.
Henri endeavoured to take advantage of the check in the fortunes of his antagonists; he sent Anne de Montmorency to support Gaspard de Coligny, the Admiral of France, in Picardy, and in harmony with Paul IV., instructed Francois, Duc de Guise, to enter Italy to oppose the Duke of Alva. As of old, the French arms at first carried all before them, and Guise, deeming himself heir to the crown of Naples (for he was the eldest great-grandson of Rene II., titular King of Naples), pushed eagerly forward as far as the Abruzzi. There he was met and outgeneraled by Alva, who drove him back to Rome, whence he was now recalled by urgent summons to France; for the great disaster of St. Quentin had laid Paris itself open to the assault of an enterprising enemy. With the departure of Guise from Italy the age of the Italian expeditions comes to an end.
On the northern side of the realm things had gone just as badly.
Philibert of Savoy, commanding for Philip with Spanish and English troops, marched into France as far as to the Somme, and laid siege to St.
Quentin, which was bravely defended by Amiral de Coligny. Anne de Montmorency, coming up to relieve the place, managed his movements so clumsily that he was caught by Count Egmont and the Flemish horse, and, with incredibly small loss to the conquerors, was utterly routed (1557).
Montmorency himself and a crowd of nobles and soldiers were taken; the slaughter was great. Coligny made a gallant and tenacious stand in the town itself, but at last was overwhelmed, and the place fell. Terrible as these mishaps were to France, Philip II. was not of a temper to push an advantage vigorously; and while his army lingered, Francois de Guise came swiftly back from Italy; and instead of wasting strength in a doubtful attack on the allies in Picardy, by a sudden stroke of genius he assaulted and took Calais (January, 1558), and swept the English finally off the soil of France. This unexpected and brilliant blow cheered and solaced the afflicted country, while it finally secured the ascendency of the House of Guise. The Duke's brother, the Cardinal de Lorraine, carried all before him in the King's councils; the Dauphin, betrothed long before, was now married to Mary of Scots; a secret treaty bound the young Queen to bring her kingdom over with her; it was thought that France with Scotland would be at least a match for England joined with Spain. In the same year, 1558, the French advance along the coast, after they had taken Dunkirk and Nieuport, was finally checked by the brilliant genius of Count Egmont, who defeated them at Gravelinea. All now began to wish for peace, especially Montmorency, weary of being a prisoner, and anxious to get back to Court, that he might check the fortunes of the Guises; Philip desired it that he might have free hand against heresy.
And so, at Cateau-Cambresis, a peace was made in April, 1559, by which France retained the three bishoprics and Calais, surrendering Thionville, Montmedy, and one or two other frontier towns, while she recovered Ham and St. Quentin; the House of Savoy was reinstated by Philip, as a reward to Philibert for his services, and formed a solid barrier for a time between France and Italy; cross-marriages between Spain, France, and Savoy were arranged;--and finally, the treaty contained secret articles by which the Guises for France and Granvella for the Netherlands agreed to crush heresy with a strong hand. As a sequel to this peace, Henri II. held a great tournament at Paris, at which he was accidentally slain by a Scottish knight in the lists.