Kammala wannan jumla: Wani ɓangare na Sickles' Excelsior Brigade, New York na 72 ya shiga cikin yawancin yaƙe-yaƙe mafi muhimmanci na yaki. An kai shi zuwa Washington, DC, membobin wannan rundunar sun fara haɗuwa da Division of the Potomac (Sickles 'Brigade), kuma an ba su izinin kare birnin kafin su shiga cikin rundunar sojojin Union zuwa ƙananan Maryland (Satumba 15 <unk> Oktoba 2, 1861). Daga nan sai aka sake sanya su a matsayin Brigade na Sickles zuwa Sojojin Amurka na Potomac a watan Oktoba a matsayin wani ɓangare na rundunar da Brigadier-General Joseph Hooker ya umurta. Sakamakon su na gaba ya zo ne a matsayin wani ɓangare na Rundunar Sojan Amurka ta Uku, Division na biyu lokacin da suka shiga cikin ci gaba na Union Army a Manassas, Virginia (Maris 10, 1862), da yawon shakatawa daga Dumfries zuwa Fredericksburg, kama kantin sayar da kayayyaki (Maris 18), da kuma bincike daga Liverpool Point zuwa Stafford Court House da kuma ayyukan da suka biyo baya a can (Afrilu 4). An sake sanya su zuwa Kamfen na Peninsula, sai suka shiga cikin Siege na Yorktown, Virginia (Afrilu 5-Mayu 4, 1862), kuma sun yi asara mai yawa a yakin Williamsburg (Mayu 5). A lokacin da aka gama wannan yakin, kusan 'yan kungiyar 200 sun mutu ko suka ji rauni, asarar da ba za a sake fuskantar kungiyar ba har zuwa karshen yakin. Na gaba ya shiga cikin &lt;a href="Battle%20of%20Seven%20Pines"&gt;Battle of Seven Pines/Fair Oaks&lt;/a&gt; (Mayu 31 <unk> Yuni 1), sojojin sun yi yaƙi a cikin Yakin Kwanaki Bakwai a Oak Grove (Yuni 25), Peach Orchard da
Tashar Savage (Yuni 29), White Oak Swamp da Glendale (Yuni 30), da kuma Malvern Hill (Yuli 1 da Agusta 5). An canja shi daga Peninsula a lokacin kaka na 1862, rundunar ta ga aikin da aka yi a cikin Manassas Station Operations (Agusta 25-27) da kuma na biyu na Bull Run (Agusta 28-30).