Sigismund had fretted under the constant raids on his kingdom, above referred to, and had for some time past been contemplating war against the Ottomans for the recovery of the fortresses on the Danube, which were so great a menace to him. For this purpose he appealed, in 1395, to the Christian Powers of Europe for assistance. He was backed up by Pope Boniface IX, who preached another crusade against the infidels. Through the efforts of the King of France, Charles VI, a large number of leading nobles of France were induced to band together, under the Comte de Nevers, son of the Duke of Burgundy, a young man of twenty-two years, without any military experience. A thousand horsemen, chevaliers of good birth and position, and six thousand attendants and mercenaries were enrolled in France for this adventure. Others came from England and Scotland, and from Flanders, Lombardy, and Savoy. On their march through Germany to Hungary they were joined by great numbers of German knights, under Count Frederick of Hohenzollern, the Grand Prior of the Teutonic Order, and by a large force of Bavarians, under the Elector Palatine. Later they were reinforced by a number of the Knights of St. John of Jerusalem, under the command of de Naillac, their Grand Master. When joined by the Hungarian army, under Sigismund, and by the contingents from Wallachia and Bosnia, they made up a total force of about sixty thousand men. The expedition was in the nature of a crusade, but was more secular than religious in its aims and methods, and was regarded, it seems, by most of those engaged in it rather as a kind of picnic than as a serious campaign. The composite force collected together at Buda, in Hungary, in the summer of 1396, and thence marched down the Danube to Nicopolis, capturing Widdin and Sistova on the way. When passing through Serbia they ravaged wide districts inhabited by innocent Christians, and emulated, if they did not exceed, the Ottomans in cruel devastation, as though they were in an enemy’s country. They established their camp before Nicopolis in September, but for sixteen days they refrained from assaulting the fortress, which was bravely defended by an Ottoman garrison, thus giving time to Bayezid to collect his army and to advance against the allied forces.