Rubuta ci gaba don wannan sakin layi - Stevens ya kasance mai taimakawa na Corps of Engineers a lokacin Yakin Mexico-Amurka, yana ganin aikin a siege na Vera Cruz da Cerro Gordo, Contreras, da Churubusco
Ka yi haƙuri. A cikin yakin na karshe, ya kama hankalin shugabanninsa, wanda ya ba shi lambar yabo ta kyaftin din. An sake ambaci shi kuma an ba shi izini don ƙarfin hali a yakin Chapultepec, a wannan lokacin zuwa matsayi na manyan. Stevens ya halarci yaƙi a Molino del Rey, da kuma Yaƙin Mexico City, inda ya ji rauni sosai. Daga baya ya rubuta littafi game da abubuwan da ya faru, "Campaigns na Rio Grande da Mexico, tare da Sanarwa game da Ayyukan Major Ripley na kwanan nan" (New York, 1851).