Kammala jumla mai zuwa: Warre ya halarci Kwalejin Soja ta Royal, Sandhurst a lokacin rani na 1807 kuma a watan Mayu na gaba an nada shi "mai taimakawa" ga Manjo Janar Sir Ronald Craufurd Ferguson. Bayan 'yan watanni bayan haka, Warre ya koma ƙasarsa ta Portugal inda ya ga aikin a yakin da aka yi a
Roliça (17 ga Agusta) da Vimeiro (21 ga Agusta) kafin su kamu da cutar dysentery. An tura shi zuwa Lisbon don murmurewa, inda Manjo-Janar William Carr Beresford ya yi maraba da shi a gidansa. Bayan da ya warke, Beresford ya sanya Warre a cikin ma'aikatansa kuma ya yi aiki a duk lokacin yakin Sir John Moore, ya ƙare tare da yakin Coruña a watan Janairun 1809.