The Army of Observation soon became the Army of Occupation. On the fields of Palo Alto, Resaca De La Palra, and at Monterey, where the regimental band of the Fourth threw away their instruments, seized a Mexican light battery, and swung it about upon their fleeing enemy. According to the official citation, the breast cord of honor given them and their successors was red, the artillery's color, to show that they were expert artillerymen as infantrymen. General Taylor had in his command leaders such as Lieutenant Ulysses S. Grant and Captain Robert E. Lee serving as a company commander of engineers. These battles had a great influence in molding the leaders of the American Civil War, which followed.