Whakaotihia te rerenga e whai ake nei: I te pakarutanga o te Pakanga Crimean, i whakauruhia a Chapman ki te Rōpū Tuatahi, i whakahaua e Prince George, Duke o Cambridge, hei rangatira miihini matua. I whai wāhi ia ki te
Ko te Pakanga o te Alma a i whakahuatia i roto i nga tuku o te 28 o Mahuru 1854, i te whakahau i nga mahi miihini i te whakapae o Sevastopol. I noho ia ki te Pakanga o Inkerman, a, i whakahuatia ia i roto i nga karere i te 11 o Noema 1854, 23 o Hune 1855 me te 9 o Hepetema 1855. I te 5 o Hōngongoi 1855 i whakawhiwhia ia ki te Order of the Bath me te whiwhi honore mai i etahi atu kawanatanga ke, tae atu ki te whakawhiwhia ki a ia hei rangatira tuatoru o te Order of the Medjidie. I whakawhiwhia ki a ia he penapena e te kawanatanga o Ingarangi mo te ratonga rongonui i te 23 o Noema 1858. I te 8 o Paenga-whāwhā 1856 i tohua a Chapman hei Kaiwhakahaere Matua o te Royal Engineer i te Rohe o Rānana, i mua i tana whakawhiti ki Aldershot i te Mahuru 1857. I te 1 o Paenga-whāwhā 1859 i whakatairangahia ia ki te rangatira rangatira. Mai i te 1 o Hepetema 1860 i mahi ia hei kaiawhina mo nga Kaitohutohu o te Royal Engineers i Horse Guards mo nga tau e rima. I whakawhiwhia ia hei Knight Commander o te Order of the Bath i te 13 o Poutu-te-rangi 1867 ana i te 8 o Paenga-whāwhā i tohua ia hei kawana me te rangatira rangatira o Bermuda. I te 1 o Hōngongoi 1870 i whakarerea e ia tenei tūranga ka whakaae ki te whakatuu i te Kaiwhakahaere-Tianara mo nga Whakapaipai me te Kaiwhakahaere o nga Mahi i te Tari Pakanga.