Kammala jumla mai zuwa: Dunham ya shafe hunturu na 1861<unk>1862 tare da sansanin Massachusetts na 11 kusa da Washington yayin da sojojin Tarayyar suka horar da kuma shirya don Kamfen na Peninsular. A farkon yakin, rundunar ta shiga cikin yakin Williamsburg a ranar 5 ga Mayu, 1862, ta dauki mummunan rauni. Don halayyarsu a lokacin yakin, Gwamna John Andrew na Massachusetts ya ba da sashin sabon tutar yaƙi. A lokacin da ya rage na yakin basasa na Peninsular, 11th Massachusetts ya kasance a cikin aikin da ake yi a cikin aikin. Sun taka muhimmiyar rawa a cikin Yakin Kwanaki Bakwai da aka yi a cikin Yaƙe-yaƙe na
Tashar Savage da kuma Malvern Hill.