Kamilisha sentensi ifuatayo: Mnamo 1862 Battery M ilihamia na Jeshi la Potomac kwenda Virginia kama sehemu ya Kampeni ya Peninsula ya Meja Jenerali George B. McClellan (Machi-Julai 1862). Imeunganishwa na Artillery Reserve ya Jeshi la Potomac chini ya Kanali Henry J. Hunt, Battery M ilipewa Brigadi ya Kwanza (U.S. Horse Artillery Brigade) chini ya amri ya Luteni Kanali William Hays. Benson aliongoza kitengo chake kwa ufanisi kupitia kuzingirwa Yorktown, vita ya Hanover Court House, na
Vita ya Miti Saba (Kituo cha Fair Oaks).