Rukunin na 3 na Dragoons an sanya shi ne a cikin balaguro zuwa tsakiyar Mexico, saukowa kusa da Vera Cruz tare da rundunar Manjo Janar Winfield Scott kuma sun shiga cikin Siege na Vera Cruz, Battle of Churubusco
da kuma yakin Molino del Rey. Na uku na Dragoons ya shiga cikin Janar Joseph Lane na Janar Santa Anna a watan Janairun 1848, da kuma yakin da Lane ya yi da sojojin 'yan bindiga na Joaquín Rea a aikin Atlixco da Padre Jarauta a ƙarshen Fabrairu 1848.