A cikin 1048 Drogo ya umurci wani balaguro zuwa Calabria ta hanyar kwarin Crati, kusa da Cosenza. Ya rarraba yankunan da aka ci nasara a Calabria kuma ya ba wa ɗan'uwansa, Robert Guiscard, wani sansanin soja a Scribla don kare ƙofar zuwa yankin da aka ci nasara kwanan nan; Guiscard daga baya zai watsar da shi don sansanin soja a San Marco Argentano. Ba da daɗewa ba bayan haka ya auri 'yar wani ubangijin Norman, wanda ya ba shi 200 knights (ci gaba da yakin basasa a Calabria). A cikin 1051 Drogo ya kashe ta hanyar 'yan tawaye na Byzantine kuma ɗan'uwansa, Humphrey ya gaje shi. Kalubale na farko na Humphrey shi ne magance adawa da papal ga Normans.
Drogo ya ja-goranci tafiyar zuwa Calabria