 Ramba uchinyora ndima iyi - Carroll akasimudzirwa kuva kaputeni mu10th U.S. Infantry nokukurumidza pashure pokunge Hondo yeVanhu Yokutanga yatanga. Muna Zvita 1861, akagadzwa colonel we8th Ohio Infantry, regiment yemakore matatu iyo yakangoona basa muEastern Theater. Munguva ye1862 Valley Campaign, Carroll akatungamira 4th Brigade muchikamu chaJames Shields. Carroll akatungamirira boka revarwi vehondo yeUnion muHondo yeCross Keys. Akarumbidzwa nokuda kwebasa rake muHondo yeCedar Mountain. Aendeswa neboka iri kunharaunda yeNorthern Virginia, akakuvadzwa zvakaipisisa muchipfuva muhondo pedyo neRwizi rweRapidan. Akapora nenguva kuti atangezve basa rake rokutungamirira mu III Corps pamberi peHondo yeFredericksburg. 