While to art and letters Francis gave a certain amount of attention, he usually from mere indolence allowed the affairs of state to be guided by others. Until the death of his mother, Louise of Savoy, [Sidenote: 1531] he was ruled by her. Thereafter the Constable Anne de Montmorency was his chief minister. The policy followed was the inherited one which was, to a certain point, necessary in the given conditions. In domestic affairs, the king or his advisors endeavored to increase the power of the crown at the expense of the nobles. The last of the great vassals strong enough to assert a quasi-independence of the king was Charles of Bourbon. [Sidenote: 1523-4] He was arrested and tried by the Parlement of Paris, which consistently supported the crown. Fleeing from France he entered the service of Charles V, [Sidenote: 1526] and his restoration was made an article of the treaty of Madrid. His death in the sack of Rome closed the incident in favor of the king. [Sidenote: May, 1527] The foreign policy of France was a constant struggle, now by diplomacy, now by arms, with Charles V. The principal remaining powers of Europe, England, Turkey and the pope, threw their weight now on one side now on the other of the two chief antagonists. Italy was the field of most of the battles. Francis began his reign by invading that country and defeating the Swiss at Marignano, thus conquering Milan. [Sidenote: September 14-15, 1515] The campaigns in Italy and Southern France culminated in the disastrous defeat of the French at Pavia. [Sidenote: February 24, 1525] Francis fought in person and was taken prisoner. "Of all things nothing is left me but honor and life," he wrote his mother. Francis hoped that he would be freed on the payment of ransom according to the best models of chivalry. He found, however, when he was removed to {186} Madrid in May, that his captor intended to exact the last farthing of diplomatic concession. Discontent in France and the ennui and illness of the king finally forced him to sign a most disadvantageous treaty, [Sidenote: January 14, 1526] renouncing the lands of Burgundy, Naples and Milan, and ceding lands to Henry VIII. The king swore to the document, pledged his knightly honor, and as additional securities married Eleanor the sister of Charles and left two of his sons as hostages. Even when he signed it, however, he had no intention of executing the provisions of the treaty which, he secretly protested, had been wrung from him by force. The deputies of Burgundy refused to recognize the right of France to alienate them. Henry VIII at once made an alliance against the "tyranny and pride" of the emperor. Charles was so chagrined that he challenged Francis to a duel. This opera bouffe performance ended by each monarch giving the other "the lie in the throat."