 Ramba uchiverenga ndima iyi - Akasimudzirwa kuva lieutenant musi wa1 August 1826, Pearson aiva ADC kuna Earl Amherst panguva yaakashanyira Maharaja Ranjit Singh, uyo akamupa bakatwa rokuremekedza nokuda kwokubudirira kutasva bhiza rakanga risingadzoreki. Akazoendeswa ku59th 2nd Nottinghamshire Regiment of Foot, achigamuchira kaputeni mu regiment musi wa 16 Nyamavhuvhu 1831. Musi wa9 Zvita, akava kaputeni nekuchinjana mu16th The Queens Lancers. Muna Zvita 1843, akarwa pasi paSir Hugh Gough paHondo yeMaharajpur panguva yeGwalior Campaign uye zvakare akashongedzwa. Mukati meHondo Yokutanga yeAnglo-SikhPearson akatungamira chikwata paHondo yeAliwal, achitungamira chikwata chake munguva yekupedzisira yehondo iyoyo uye zvakare muHondo yeSobraon, iyo yaakataurwa kaviri mumatare. Akagamuchira ruzhinji rwepamutemo musi wa 19 Chikumi 1846, uye akava mukuru nekutenga musi wa 23 Kubvumbi 1847. 