Kammala jumla mai zuwa: A watan Yulin 1239, an sanya shi a matsayin babban mai kula da mulkin mallaka a Lombardy, da kuma Janar-Legate a Romagna, kuma ya bar Sardinia ba zai dawo ba. Kasancewa cikin rabuwa da mahaifinsa a cikin wannan shekarar, ya ɗauki muhimmiyar rawa a cikin yaƙin da ya ɓarke tsakanin sarki da fafaroma. A shekara ta 1241, ya shiga cikin kama wani jirgin ruwa na papal a
Yaƙin Giglio a cikin Tekun Tyrrhenian. Matakinsa na farko da ya yi nasara a matsayin shugaban sojoji shi ne sake dawo da Jesi, a cikin Marche, wanda shine wurin haihuwar Frederick. A watan Mayu na 1241 ya kasance a cikin rundunar sojojin da suka kayar da rundunar sojojin Genoese a Meloria, inda ya kwace ganima da yawa kuma ya kama wasu limamai da ke ci gaba da zuwa majalisar da Gregory ya kira zuwa Rome. Daga baya an kama shi a cikin wani rikici da Milanese a Gorgonzola, amma ba da daɗewa ba aka sake shi. A cikin 1245 ko 1246 an soke aurensa. A cikin 1247, ya shiga cikin Siege na Parma wanda bai yi nasara ba kuma ya ci gaba da yaƙi da Guelph Lombards, yana kai hari Reggio da kuma kai hari a kewayen Parma.