Grant graduated on June 30, 1843, rated twenty first out of 39 in his class and was promoted the next working day to the rank brevet second lieutenant. Promoted to captain on August 5, 1853, Grant was assigned to command Company F, 4th Infantry, at the freshly made Fort Humboldt in California. Grant arrived at Fort Humboldt on January 5, 1854, commanded by Lieutenant Colonel Robert C.