Rubuta ci gaba ga wannan sakin layi - An horar da shi a Kwalejin Dulwich, Gillman an ba shi izini a cikin Royal Field Artillery a watan Yulin 1889. An daukaka shi zuwa laftanar a ranar 27 ga Yuli, 1892, kuma zuwa kyaftin (wanda ya fi yawa a kafa) a ranar 9 ga Oktoba, 1899. Ya yi aiki a Yaƙin Boer na biyu 1899-1900, inda ya shiga cikin Taimako na Kimberley, da kuma yaƙe-yaƙe na Paardeberg
(karshen Fabrairu 1900), Poplar Grove, da kuma Driefontein (Maris 1900). A ƙarshen 1901 ya kasance a Kudancin Najeriya, inda aka haɗa shi a matsayin jami'in ma'aikaci ga gungu da ke shiga cikin yaƙin Aro-Anglo (Nuwamba 1901 zuwa Maris 1902), wanda aka ambata shi a cikin sakonni daga jami'in da ke ba da umarni a matsayin "ba shi da daraja, mai sanyi da cike da kuzari". An kuma nada shi a matsayin Abokin Abokin Sabis na Musamman (DSO) don ayyuka a lokacin yakin. A watan Mayu 1902 ya sami alƙawari na yau da kullun a matsayin kyaftin na Batirin 119 na Fasahar Fasahar. Daga baya ya shafe lokaci a Kudancin Najeriya a 1902.