Kammala jumla mai zuwa: Duk da haka babban burin Petrobey shine 'yancin Girka daga mulkin Ottoman, kuma ya yi amfani da ikonsa na gida da ikon cin gashin kansa don gina goyon baya ga babban tawayen Girka. A shekara ta 1821 wannan tawaye ya fara a cikin abin da zai zama Yakin Girka na Independence. An san shi a matsayin mai kulla yarjejeniya kuma da yardar rai ya ba da jagorancin tawayen ga Theodoros Kolokotronis lokacin da ya zama dole a siyasa. Ya ba da gudummawar dakarun sojoji masu mahimmanci don 'yantar da Kalamata da
Tripolis kuma ya shiga cikin aikin don taimakawa Souliotes. A wannan tafiyar ɗan ƙaramin ɗan'uwan Petrobey Kyriakoulis Mavromichalis ya mutu da jaruntaka yana yaƙi da Turkawa. A karkashin jagorancin Petrobey da dan uwansa Konstantinos Mavromichalis, sojojin Girka sun yi nasarar kayar da shahararren kwamandan Ottoman Ibrahim Pasha a lokacin mamayewar Masar na Mani. Wannan nasarar ta soja ta tabbatar da ikon Girka na birni mai mahimmanci na Nafplio wanda, bayan juyin juya halin, zai zama babban birni na farko na jihar Girka ta zamani.