<prompt> Qedela umusho olandelayo: Phakathi neMpi YaseMexico neMelika, walwa eMpini yaseContreras nase-  <response>: Impi yaseChurubusco, zombili ngo-August 1847. Ngesikhathi esalwa eChurubusco walimala futhi, futhi ukusebenza kwakhe lapho kuhlangene nezenzo zakhe eContreras kwamenza wakwazi ukuthola isikhundla sokuba ngumphathi omkhulu ngo-Agasti 20. UWalker wabe esehlanganyela eMpini yaseMolino del Rey ekuqaleni kukaSepthemba futhi walimala futhi, kulokhu emhlane. Ngenxa yezenzo zakhe lapho, wakhushulelwa esikhundleni sokuba u-lieutenant colonel ngo-September 8. 