... During this time he had gone through the different grades up to captain, Second artillery. He was chief of commissariat of the army under Maj.-Gen. Winfield Scott and was present at the siege of Vera Cruz , battles of Cerro Gordo, Churubusco, Molino del Rey, Chapultepec, and at the assault and capture of the city of Mexico. He was brevetted major, August 20, 1847, for gallant and meritorious conduct ...