Faatumu le fuaiupu lenei: I le 1862 na siitia atu ai le Battery M ma le Army of the Potomac i Virginia o se vaega o le Major General George B. McClellan's Peninsula Campaign (Mati-Iulai 1862). O le Battery M na tuu i le First Brigade (U.S. Horse Artillery Brigade) i lalo o le pule a le Lieutenant Colonel William Hays. Na taʻitaʻia lelei e Benson lana vaega i le osofaʻiga o Yorktown, o le Taua i Hanover Court House, ma le
Taua o le Seven Pines (Fair Oaks Station).