Mezue ahịrịokwu na-esonụ: O jere ozi na Agha Mexico na America na Major James Duncan's Battery A, 2nd U.S. Artillery, ebe a na-emekarị ya maka "ezi àgwà" site na ọkwa nke onwe na 1845 site na ọkwa nke onye isi nke abụọ na June 28, 1848, emesịrị mee ka ọ bụrụ mgbe agha gasịrị na January 26, 1849. Benson so na Batrị A n'agha ndị a lụrụ na
Palo Alto, Resaca de la Palma, Monterrey, Vera Cruz, na Churubusco. Ọ rịgoro n'ọkwa nke onye isi ndị agha nke mbụ na-achị otu egbe egbe na batrị Duncan n'okpuru onye isi ngalaba Lieutenant Henry Jackson Hunt na nnọchibido nke Mexico City, na-arụsi ọrụ ike na Agha Chapultepec na San Cosmé Garita.