<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-1846, ekuqaleni kweMpi yaseMexico neMelika, uRoberts waphinde wamiswa njengeluthenanthi wokuqala, eMunted Rifles, e-Regular Army. Wakhushulelwa esikhundleni sokuba ngukaputeni ngo-1847, futhi wabona isenzo eVeracruz, eCerro Gordo, eContreras, eChurubusco  <response>: , nokuthunjwa kweMexico City, iMatamoros nesigodi saseGalajara. EChurubusco, wathola isikhundla sokuba umphathi-mkhosi ngenxa yokuhola iqembu eliphambili labahlaseli. Wathola esinye isikhundla esiphakeme, saba ngu-lieutenant colonel ngo-1847 ngenxa yesibindi sakhe ngesikhathi sempi. Ngemva kokuphela kwezimpi, wakhonza emngceleni naseWashington, D.C. 