Dhameystir weedha soo socota: Sanadkii 1861, bilowgii Dagaalkii Sokeeye ee Maraykanka, wuxuu ahaa Adjutant-ka Guutada Saddexaad ee Dagaalka. Muddo yar ka dib, wuxuu iska casilay inuu ku biiro shaqaalaha General Edwin Vose Sumner oo ah "caawiyaha sare ee xerada", isagoo gaadhay darajada Major. Wuxuu ka mid ahaa ciidankii Potomac ee ka qayb qaatay dagaalladii Yorktown, Williamsburg, Fair Oaks, Seven Pines, Savage's Station, Glendale, Malvern Hill, Antietam, Fredericksburg (dhammaantood waxay dhaceen 1862), iyo
Waxaa la qabtay bishii Nofeembar 1863 ilaa bishii Diseembar 1863.