Stevens was the adjutant of the Corps of Engineers during the Mexican-American War, seeing action at the siege of Vera Cruz and at Cerro Gordo, Contreras, and
ąąąąąąąąąąą ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Stevens participated in combat at Molino del Rey, and the Battle for Mexico City, where he was severely wounded. He later wrote a book on his adventures, "Campaigns of the Rio Grande and Mexico, with Notices of the Recent Work of Major Ripley" (New York, 1851).