Tuhia tētahi tohutoro mō tēnei wāhanga - I whakawhiwhia a Crookshank ki te tūranga tuarua i roto i te Royal Engineers i te 23 o Hōngongoi 1887, i whakatairangahia ki te tūranga tuarua i te 23 o Hōngongoi 1890, ā, ki te tūranga rangatira i te 1 o Paenga-whāwhā 1898. I mahi ia i te Pakanga Tuarua o Boer, a, i whara noa ia i te pakanga o Paardeberg
(Hepetema 1900). I whakawhiwhia ia ki te wehenga 7 o nga hoia hiko o te South Africa Field Force. I te tau 1932 i tohua ia hei Kaitiaki Tangata a te Kingi.