the precarious situation of the crusaders in asia spurred the pope to organise a second expedition in 1345. in november, under the command of humbert ii of viennois, the second smyrniote crusade set out from venice. in february 1346 it won a victory over the turks at mytilene but humbert did little more at smyrna than sortie against the turks and refortify the christian section of the city. the next five years were occupied by clement vi with attempts to negotiate a truce with the turks, who kept smyrna in a constant state of siege by land and direct financial and military aid to the city. although clement's concern with the crusade ended abruptly in september 1351, the city of smyrna remained in christian hands until the siege of smyrna by the timurids in 1402.