Nyorai kupfuurira kweiyi ndima - Pakutanga kweHondo yeCrimea, Chapman akabatanidzwa kuChikamu 1st, chakarayirwa naPrince George, Duke weCambridge, semukuru mukuru weinjiniya. Akatora rutivi muHondo yeAlma
uye yakataurwa mumakadhi e28 September 1854, achitungamirira mabasa einjiniya panguva yeKukombwa kweSevastopol. Akanga aripo paHondo yeInkerman uye akataura nezvake mumashoko musi wa11 Mbudzi 1854, 23 Chikumi 1855 uye 9 Gunyana 1855. Musi wa 5 Chikunguru 1855 akaitwa Companion weOrder yeBhati uye akagamuchira rukudzo kubva kune dzimwe hurumende dzekunze, kusanganisira kuitwa mukuru wechitatu kirasi yeOrder yeMedjidie. Akapiwa pension nehurumende yeBritain nokuda kwebasa rake rakanaka musi wa 23 November 1858. Pana 8 April 1856 Chapman akagadzwa saChief Royal Engineer muLondon District, asati aendeswa kuAldershot muna September 1857. Pana 1 April 1859 akasimudzirwa kuva regimental lieutenant-colonel. Kubvira musi wa1 September 1860 akashanda semutevedzeri wemutevedzeri wemukuru weRoyal Engineers paHorse Guards kwemakore mashanu. Akaitwa Knight Commander of the Order of the Bath musi wa 13 Kurume 1867 uye musi wa 8 Kubvumbi akagadzwa gavhuna uye mukuru mukuru weBermuda. Musi wa 1 Chikunguru 1870 akasiya basa iri uye akabvuma kugadzwa kweInspector-General weFortifications uye Director weMabasa kuHurumende yeHondo.