The treaty was hardly signed when the death of Lewis in January 1515 undid this marriage and placed his young cousin, Francis the First, upon the throne. But the old king's death brought no change of policy. Francis at once prepared to renew the war in Italy, and for this purpose he needed the friendship of his two neighbours in the west and the north, Henry and the ruler of the Netherlands, the young Charles of Austria. Both were willing to give their friendship. Charles, jealous of Maximilian's desire to bring him into tutelage, looked to a French alliance as a security against the pressure of the Emperor, while Henry and Wolsey were eager to despatch Francis on a campaign across the Alps, which would at any rate while it lasted remove all fear of an attack on England. A yet stronger ground in the minds of both Charles and Henry for facilitating the French king's march was their secret belief that his invasion of the Milanese would bring the young king to inevitable ruin, for the Emperor and Ferdinand of Aragon were leagued with every Italian state against Francis, and a Swiss army prepared to dispute with him the possession of the Milanese. Charles therefore betrothed himself to the French king's sister, and Henry concluded a fresh treaty with him in the spring of 1515. But the dreams of both rulers were roughly broken. Francis succeeded both in crossing the Alps and in beating the Swiss army. His victory in the greatest battle of the age, the battle of Marignano, at once gave him the Milanese and laid the rest of Italy at his feet. The work of the Holy Alliance was undone, and the dominion which England had dreaded in the hands of Lewis the Twelfth was restored in the younger and more vigorous hands of his successor. Neither the king nor the Cardinal could hide their chagrin when the French minister announced his master's victory, but it was no time for an open breach. All Wolsey could do was to set himself secretly to hamper the French king's work. English gold hindered any reconciliation between France and the Swiss, and enabled Maximilian to lead a joint army of Swiss and Imperial soldiers in the following year over the Alps. [Sidenote: Charles the Fifth]