Dhameystir weedhan soo socota: Maarso 8, 1846, kadib isku daygii ugu dambeeyay ee lagu cadaadinayo Mexico inay degaan xuduudka Texas, Xoghayaha Dagaalka William L. Marcy wuxuu amar ku bixiyay Brigadier General Zachary Taylor inuu ciidankiisa, oo ay ku jiraan May's dragoon squadron, u guuro Rio Grande. Taylor waxa uu u safray dhanka waqooyi ee webiga, oo si toos ah uga soo horjeeda magaalada Matamoros ee Mexico, oo ku taala meel dabiici ah oo xakameysa marin u helka waddooyinka aadka loo maro ee koonfurta. Markii Taylor uu diiday inuu ka tago gobolka, ciidamada fardaha ee Mexico waxay weerareen kooxda dragoon-ka ee uu hoggaaminayay Captain Seth B. Thornton bishii Abriil 25, 1846, taas oo si rasmi ah u bilowday colaadaha. May 8, 1846, labada ciidan ee ugu waaweynaa waxay ku kulmeen
Dagaalkii Palo Alto, halkaas oo ciidankii May ay ku sugnaayeen kaydka oo ay ku soo qaadeen weerarkii fardooleyda ee aan guuleysan.