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