Kammala jumla mai zuwa: A ranar 12 ga Yuli 1808 Robe ya tashi zuwa Portugal, a matsayin kwamandan bindigogi na Arthur Wellesley. Ya halarci taron
Yaƙin Roliça a ranar 17 ga Agusta da Yaƙin Vimeiro a ranar 21 ga Agusta, kuma an ambaci shi a cikin wasiku. A Vimeiro ya yi amfani da harsashi na shrapnel a karo na farko, kuma ya yi farin ciki da tasirinsa wanda ya nemi manyan kayayyaki na shi. A lokacin da Faransawa suka kwashe Lisbon, Robe ya mallaki kayan aiki a cikin kagara. Lokacin da sojojin Sir John Moore suka bar Spain, Robe ya kasance a matsayin kwamandan bindigogi a Lisbon, a karkashin Sir Harry Burrard da John Craddock, har zuwa lokacin da Brigadier-General Howarth ya zo a watan Afrilu 1809. A lokacin da Wellesley ya dawo daga Ingila don ya dauki umurnin sojojin Birtaniya a cikin Peninsula a watan Afrilu na 1809, Robe ya kasance mai kula da masu ajiyar makamai. Ya shiga cikin ci gaba da Marshal Soult zuwa Tras os Montes, da kuma kama Porto a watan Mayu. Ya kasance a cikin ci gaba zuwa Spain a kan Joseph Buonaparte, yakin Talavera a ranar 27 ga Yuli, 1809, kuma a cikin koma baya na gaba a kan Mesa d'Ibor zuwa Truxillo, kuma daga can zuwa Badajos. A shekara ta 1810 an nada shi a matsayin kwamandan kungiyar direbobi na Royal Artillery, kuma ya shiga cikin koma baya zuwa Lines na Torres Vedras, gami da yakin Bussaco a ranar 28 ga Satumba.