Rubuta ci gaba don wannan sakin layi - Yaƙe-yaƙe masu tsada da aka yi wa Venice da kuma mummunar tasirin Black Death ya rage ƙarfin sojojin ruwan Genoese. Haɓaka manyan ƙasashe na ƙasashe ya kuma rage ikon ƙananan ƙananan birni don yin gasa a soja. Genoa (tare da taimakon Faransawa) suka soma yaƙin basasa
a kan Tunisia a 1390, da niyyar kare Genoese cinikayya yankuna daga Musulmi 'yan fashi. A lokacin yakin, sojojin ruwan Genoese sun ba da jiragen ruwa yayin da mahayan Faransa suka kewaye sansanin Mahdi. Yaƙin ya kasance nasara ga sojojin Kirista, amma kuma ya haifar da Faransawa samun tasirin siyasa a Genoa, wanda aka matsa lamba don bayyana kanta a matsayin mulkin Faransa a 1396. An kawo sojojin ruwan Genoese a ƙarƙashin ikon Faransa, kuma a ranar 7 ga Oktoba 1403 Venice ta ci nasara a yakin Modon bayan da sojojin ruwan Genoese suka mamaye yankunan cinikin Venetian. Jamhuriyar ta sami 'yancin kai daga Faransa a cikin 1409, amma darajar sojoji ta lalace sosai kuma garin ya kasance abin sha'awa na siyasa ga Faransa da Aragon. A cikin 1435 an aika da jirgin ruwan Genoese bisa buƙatar Milan zuwa garin Gaeta, wanda Aragon ya kewaye shi. A lokacin, Duke na Milan da Sarkin Aragon suna yaƙi a kan wanda zai mallaki Mulkin Sicily. Jirgin ruwan Genoese ya isa Gaeta kuma ya kayar da jirgi mafi girma na Aragonese a yakin Ponza. An tilasta wa jirgin ruwan Aragonese ya mika wuya kuma an kama Sarki Alfonso V na Aragon. Duk da wannan koma baya, Aragon ya yi nasara a cikin rikici kuma Sicily ta kasance ƙarƙashin ikon Aragonese, yana mai da hanyar wucewa ta mashigar Messina da wuya kuma ya ƙara rushe ayyukan jiragen ruwa na Genoese.