Whakaotihia te rerenga e whai ake nei: I kite a Davidson i muri i te mahi i Awherika ki te Tonga i te Pakanga Anglo-Zulu o 1879, i whara ai ia i te pakanga whakamutunga o te pakanga i Ulundi. I whakatairangahia ia ki te rangatira i te Hanuere 1880, a i taua tau ano i whawhai ia i te waahanga tuarua o te Pakanga Tuarua o Ingarangi-Afghan. I tohua a Lord Napier hei Kawana o Gibraltar i te 1876, a ko Davidson ano tana "aide-de-camp" mai i te Tihema 1881 ki te Tihema 1882. Whai muri i tenei ka hoki mai ia ki te mahi i Ingarangi Inia, i reira i whakatairangahia ai ia ki te rangatira nui ka tukuna ki te Tari Ordnance Inia. Ko etahi atu whakatairanga i roto i te Royal Horse Artillery i whai ake i te Hanuere 1896, i te wa i whakatairangahia ai ia ki te koromatua, me te koromatua i te Hanuere 1900. I takahi tenei ki tana whakatuunga ki nga kaimahi o te Royal Artillery i Awherika ki te Tonga i te Pakanga Tuarua o Boer. I whakahaua e ia te Royal Horse Artillery i to ratou haerenga ki te whakaora i a Kimberley, a i tae atu ia ki etahi atu mahi, tae atu ki nga Pakanga o
Ko Paardeberg, ko Poplar Grove, ko Driefontein. I whakahuahia a Davidson i roto i nga karere mo nga mahi rongonui i te wa o te pakanga. I wehe ia i tana tūranga i runga i te kaimahi i te Hanuere 1901, a i whakauruhia ki te rarangi haurua-utu, engari i hoki mai ki te kaimahi i te Oketopa o taua tau. Mo tana mahi i te pakanga, i whakawhiwhia ki a ia te Tohu a te Kuini, e wha nga kopare. I te Paenga-whawha 1901, i whakawhiwhia ia hei hoa ki te Order of the Bath. Whai muri i te pakanga, ka hoki ia ki Ingarangi i reira ko ia te Koronela o te Kaimahi e whakahau ana i te Royal Artillery, North-Eastern District, i mua i te whakakore i te pou me te whakauru ki te raarangi haurua-utu i te Oketopa 1904. E toru tau i muri mai, i te Hanuere 1907, ka reti ia i te ope taua.