Rubuta ci gaba don wannan sakin layi - A ranar 8 ga Maris, 1846, bayan ƙoƙari na ƙarshe na matsa lamba ga Mexico don daidaitawa kan iyakar Texas, Sakataren War William L. Marcy ya umarci Brigadier Janar Zachary Taylor ya tura sojojinsa, wanda ya haɗa da rundunar mayaƙan May, zuwa Rio Grande. Taylor ya nufi gefen arewa na kogin, daura da garin Matamoros na Mexico, wanda yake a wurin da ba a samun ruwa sosai kuma yana da iko a kan hanyoyin da ake bi zuwa kudu. Lokacin da Taylor ya ƙi barin yankin, sojojin doki na Mexico sun yi wa wani dan wasan dragons a karkashin Kyaftin Seth B. Thornton a ranar 25 ga Afrilu, 1846, wanda ya fara fara tashin hankali. A ranar 8 ga Mayu, 1846, manyan sojojin biyu sun hadu a yakin Palo Alto
, inda aka gudanar da rundunar May a cikin ajiya kuma ta kafa wani mummunan hari na doki.