Gideon Pillow then brought in his artillery, under the command of Capt. John B. Magruder, Lt. Franklin D. Callender, and Lt. Jesse L. Reno. In the meantime Col. Truman B. Ransom's 9th Infantry and Lt. Col. Milledge L. Bonham's 12th moved forward on the American right to within 200 yards of Valencia's camp by nightfall. Pillow also sent General Bennet Riley's brigade, supported by General George Cadwalader, to seize San Jerónimo just north of Valencia's camp, while Persifor Smith's brigade, supported by General Franklin Pierce, struck Valencia from the front. Scott sent General James Shields brigade to Pillow who sent it after Cadwalader.