Whakaotihia te rerenga e whai ake nei: I te tau 1862 ka neke a Battery M me te Army of the Potomac ki Virginia hei waahanga o te Major General George B. McClellan's Peninsula Campaign (Mati-Hurae 1862). I whakauruhia ki te Artillery Reserve o te Army of the Potomac i raro i te Koronel Henry J. Hunt, i whakawhiwhia te Battery M ki te First Brigade (U.S. Horse Artillery Brigade) i raro i te whakahau a Lieutenant Colonel William Hays. I ārahi a Benson i tana waeine i roto i te Siege o Yorktown, te Pakanga o Hanover Court House, me te
Ko te Pakanga o Seven Pines (Fair Oaks Station).