Buuxi weedhan soo socota: Kadib markii uu ka gudbay Rio Grande, bishii September Taylor wuxuu khasaare badan ku gaarsiiyay Mexico dagaalkii Monterrey, wuxuuna qabsaday magaaladda seddex maalmood gudahood, in kasta oo ay ahayd mid aan la qabsan karin. Taylor waxaa lagu dhaleeceeyay inuu saxiixay xabad joojin "liberal" ah, halkii uu ku cadaadin lahaa is dhiibid ballaaran. Polk wuxuu rajaynayay in qabsashada Waqooyiga Mexico ay ku dhiirrigelin doonto dadka reer Mexico inay iibiyaan Alta California iyo New Mexico, laakiin dadka reer Mexico weli ma aysan rabin inay ka qeyb qaataan dhul aad u badan. Polk waxa uu ciidan u diray Winfield Scott si ay
waxaa lagu amray in ay ku sugnaadaan meel u dhow Monterrey. In badan oo kamid ah askarta khibrada leh ee Taylor ayaa la hoos geeyay amarkii Scott, taasoo ka dhigeysa in Taylor uu leeyahay ciidan yar oo aan waxtar lahayn. Jeneraalka reer Mexico Antonio López de Santa Anna wuxuu qabtay warqad ka timid Scott oo ku saabsan ciidanka yar ee Taylor, wuxuuna u dhaqaaqay woqooyiga, isagoo damacsan inuu burburiyo ciidanka Taylor ka hor inta uusan la kulmin ciidanka Scott.