Whakakiia te rerenga e whai ake nei: I tukuna a Simpson ki te 2nd Battalion, Royal Australian Regiment i te marama o Hanuere 1954, i reira i whakatairangahia ai ia hei kaitiaki i te 1955, i mahi i roto i
Mai i te Oketopa 1955 ki Malaya mō ngā tau e rua e whai ake nei. I muri mai ka tukuna ia ki te 1st Special Air Service Company (SAS) i te Whiringa-a-rangi 1957 ka mahi tahi me taua waahanga tae noa ki te wa i tohua ai ia hei tetahi o nga mema o te roopu tuatahi o te roopu whakangungu a te Ope Taua o Ahitereiria ki Vietnam (AATTV) i tukuna ki te awhina i nga ope o Vietnam ki te Tonga i te Hurae 1962. I muri mai i te tau, ka hoki ia ki te SAS i Ahitereiria ka mahi i reira mo nga marama tekau ma rua e whai ake nei.