Tuhia he haere tonu mo tenei whitianga - I haere a Robinson ki Corpus Christi, Texas, i te Mahuru 1845 ki te whakauru ki a Gen. Winfield Scott me te Ope Taua o Occupation hei kaitiaki regimental me te brigade. I te Pipiri 1846, i whakatairangahia a Robinson ki te rangatira tuatahi, a, i mahi ia i te Pakanga Mexico-American, i whawhai ki te rereketanga i te Pakanga o Monterey. I mahi hoki ia i nga pakanga o Palo Alto
me te Resaca de la Palma. I mahi ia hei kaitiaki o te regimental, o te brigade ranei i waenga i te Poutu-te-rangi 28, 1847 me te Hepetema 1, 1847 me waenga i te Hanuere 27, 1849 me te Akuhata 12, 1850.