Cika wannan magana: A shekara ta 1238, Paparoma Gregory IX ya kafa kawance tsakanin Genoa da Venice a kan daular, kuma sakamakon haka a kan Pisa, ma. Bayan shekara guda, ya yi wa Frederick II yankan zumunci kuma ya kira taron da za a yi a Roma a shekara ta 1241. A ranar 3 ga Mayu, 1241, rundunar jiragen ruwa ta Pisan da Sicilian, karkashin jagorancin dan sarki Enzo, sun kai hari kan wani jirgi na Genoese wanda ke dauke da manyan mutane daga arewacin Italiya da Faransa, kusa da tsibirin Giglio (
Yaƙin Giglio), a gaban Tuscany; Genoese sun rasa jiragen ruwa 25, yayin da aka kama kimanin ma'aikatan jirgin ruwa dubu, biyu cardinals, da kuma bishop daya. Bayan wannan babban nasara, majalisa a Roma ta kasa, amma aka kore Pisa daga cocin. An cire wannan matsanancin mataki ne kawai a shekara ta 1257. Ko ta yaya, garin Tuscan ya yi ƙoƙari ya yi amfani da yanayin da ya dace don cin nasarar garin Corsican na Aleria har ma ya kewaye Genoa kanta a 1243.