there another year, he would have graduated first. U.S. Army and the Mexican War Jackson began his United States Army career as a second lieutenant in Company K of the 1st U.S. Artillery Regiment, proceeding through Pennsylvania, down the Ohio and Mississippi Rivers to New Orleans, and from there the troops embarked for Point Isabel, Texas, and were sent to fight in the Mexican–American War from 1846 to 1848. Jackson's command was directed to report to General Taylor and proceed immediately via Matamoros and Camargo to Monterey and then to Saltillo. Prior to the Battle of Buena Vista, Lieutenant Jackson's command was ordered to withdraw from General Taylor's army and march to the mouth of the Rio Grande, where they would be transferred to Veracruz. He served at the Siege of Veracruz and the battles of Contreras, Chapultepec, and Mexico City, eventually earning two brevet promotions, and the regular army rank of first lieutenant. It was in Mexico that Thomas Jackson first met Robert E. Lee. During the assault on Chapultepec Castle on September 13, 1847, he refused what he felt was a "bad order" to withdraw his troops. Confronted by his superior, he explained his rationale, claiming withdrawal was more hazardous than continuing his overmatched artillery duel. His judgment proved correct, and a relieving brigade was able to exploit the advantage Jackson had broached. In contrast to this display of strength of character, he obeyed what he also felt was a "bad order" when he raked a civilian throng with artillery fire after the Mexican authorities failed to surrender Mexico City at the hour demanded by the U.S. forces. The former episode, and later aggressive action against the retreating Mexican army, earned him field promotion to the brevet rank of major. After the war, Jackson was briefly assigned to forts in New York, and then to Florida during the Second Interbellum of the Seminole Wars, during which the Americans were attempting to force the remaining Seminoles to move West. He was stationed briefly at Fort Casey before being named second-in-command at Fort Meade, a small fort about thirty miles south of Tampa. His commanding officer was Major William H. French. Jackson and French disagreed often, and filed numerous complaints against each other. Jackson stayed in Florida less than a year. Lexington and the Virginia Military Institute In the spring of 1851, Jackson accepted a newly created teaching position at