 Complete the following phrase:  Next, in response to the Byzantine appeal for help against the Ottoman advance, Philip instructed de Thoisy to lead his squadron to reinforce a squadron of four galleys built or hired at Nice and Venice, commanded by Waleran de Wavrin, to join Pope Eugene IVs planned Crusade. De Wavrins four galleys sailed in July 1444 but failed to stop Murad IIs Anatolian army from crossing the Bosporus. De Thoisy joined de Wavrins squadron at Constantinople, where the latter had gone to spend the winter. In the meantime, the crusading army led by Wladyslaw III of Poland Ulaszlo I as king of Hungary and Janos Hunyadi had been 