Mezue ahịrịokwu na-esonụ: Na March 8, 1846, mgbe ọ gbalịsịrị nke ikpeazụ ịmanye Mexico ka o dozie ókèala ya na Texas, Odeakwụkwọ Agha William L. Marcy nyere Brigadier General Zachary Taylor iwu ka ọ kpọga ndị agha ya, nke gụnyere ndị agha dragọn May, na Rio Grande. Ebe Taylor na-aga bụ n'akụkụ osimiri ahụ nke dị n'ebe ugwu, kpọmkwem n'ihu obodo Mexico bụ́ Matamoros, bụ́ nke dị n'ebe e si enweta mmiri ma na-achịkwa ụzọ ndị e si aga ebe ndịda bụ́ ndị a na-ejikarị eme njem. Mgbe Taylor jụrụ ịhapụ mpaghara ahụ, ndị agha ịnyịnya Mexico wakporo ndị agha dragọn n'okpuru Captain Seth B. Thornton na Eprel 25, 1846, nke malitere agha. Na May 8, 1846, ndị agha abụọ ahụ zutere na
Agha nke Palo Alto, ebe ndị agha May nọ na nchekwa ma tinye ndị agha ịnyịnya na-enweghị ihe ịga nke ọma.