A sudden raid by Renzo da Ceri on the Abruzzi seemed at first to promise a welcome diversion, but very soon the invasions of Naples proved as unprofitable as the campaigns in the north. The project of conferring the kingdom on Louis, Count of Vaudemont, the brother of the Duke of Lorraine, which Clement had put forward, faded into the visionary. The Pope shifted his ground again, and on March 15 concluded a truce of eight months for himself and Florence.
Meanwhile the imperial army had been long inactive at San Giovanni, N.W. of Bologna. Destitute of everything, it was not likely that they would accept a truce which brought them only 60, 000 ducats. A meeting had in fact already taken place, and Frundsberg, while endeavouring to pacify his Landsknechte, was struck by apoplexy; his days of activity were over. Hereupon came the news of the truce, with its impossible proposals, prolonging the intolerable condition of inaction and want. The army clamoured to go forward and Bourbon decided to lead them. The Count del Guasto, Pescara's nephew, whose Italian patriotism always competed with his duty to his master, protested and withdrew, but on March 30 the others set forth, scantily provided with transport and provisions by the Duke of Ferrara. Clement, on the conclusion of the truce, had disbanded his troops, and while Lannoy was endeavouring on his behalf to raise the money at Florence to appease the imperialists, the tumultuous advance continued. On April 21 Lannoy met Bourbon with 100, 000 ducats, but he now demanded more than twice that sum, and the march proceeded down the valley of the Arno, threatening Florence. But the army of the League was near enough to protect that city, and the only result was a futile rising of the citizens, and the accession of Florence to the League. Bourbon then determined to move on Rome, a resolution acceptable above all to his Lutheran followers. The Pope proclaimed his adhesion to the confederates, and clamoured for aid. But it was too late. On May 5 the mutinous army appeared before Rome on the Monte Mario. They had left their artillery on the road, but the city was almost undefended, except for such measures as Renzo da Ceri had been able to take on orders given at the last moment. The next day the Leonine city was assaulted and captured, the Duke of Bourbon being killed at the moment of escalading the wall. Philibert, Prince of Orange, took the command. Clement had only just time to seek refuge in St Angelo.
In the main city Renzo da Ceri endeavoured to persuade the Romans to protect themselves by breaking down the bridges, and preventing the entry of the Colonna from the south. But he failed. The Trastevere was easily captured, and the imperialists advanced without opposition across the bridge of Sixtus. For eight days the Sack continued, among horrors almost unexampled in the history of war. The Lutherans rejoiced to burn and to defile what all the world had adored. Churches were desecrated, women, even the religious, violated, ambassadors pillaged,
