Kammala wannan jumla: A lokacin yakin Mexican-American, ya yi yaƙi a yakin Contreras da
Yaƙin Churubusco, duka a watan Agusta 1847. Yayin da yake aiki a Churubusco ya sake ji rauni, kuma aikinsa a can tare da ayyukansa a Contreras ya ba shi izini ga babban jami'in a ranar 20 ga watan Agusta. Walker ya shiga cikin yakin Molino del Rey a farkon watan Satumba kuma ya sake rauni, wannan lokacin a baya. Domin ayyukansa a can an sanya shi a matsayin mai kula da jami'in a ranar 8 ga watan Satumba.