<prompt> Qedela umusho olandelayo: Ekuqaleni kweMpi Yombango, uMansfield wayala uMnyango waseWashington ngo-Ephreli 27 - Agasti 17, 1861, futhi wakhushulelwa esikhundleni sokuba ngu-brigadier general ngoMeyi 6, 1861. Umkhuzi-jikelele uWinfield Scott wancoma uMansfield ukuba abe ngumkhuzi webutho lamavolontiya elalakhiwa eWashington D.C. entwasahlobo, kodwa esikhundleni salokho umyalo waya ku-Irvin McDowell. UMansfield akazange abhekwe njengokhetho oluhle kakhulu ngenxa yobudala bakhe obuthuthukile kanye nokungabaza amabutho amavolontiya kanye nokugqugquzela kokuphatha ukushayela okusheshayo eRichmond okwakuzoqeda impi ezinyangeni ezimbalwa, futhi wayentula umxhasi wezepolitiki eWashington. Ngemuva kokunqotshwa kwe-Union eBull Run, uGeorge McClellan wabeka umyalo wemizamo yempi e-Eastern Theater futhi amathemba kaMansfield okuhola ibutho aphinde aphela. UMcClellan futhi akazange amnikeze isikhundla sokuphatha e-Army of the Potomac eyayisanda kusungulwa. UMansfield wayehlala  <response>: IHatteras Inlet, eNyakatho Carolina, ngo-Okthoba, kulandela impi eyaliwa lapho nguBenjamin Butler ngo-Agasti. Wayengumlawuli webrigade eMnyangweni waseVirginia kusukela ngoMashi kuya kuJuni 1862. Umsebenzi wakhe wokulwa kuphela phakathi nalesi sikhathi kwaba ukudubula kwamabhethri asogwini avela eHampton Roads ngokumelene ne-ironclad CSS Virginia empini yayo yasolwandle ngokumelene ne- USS Monitor ngoMashi 9, 1862. Kuze kube sekwindla ka-1862, uMansfield wayephethe iDivision Suffolk ye-VII Corps yoMnyango waseVirginia eduze kwaseSuffolk. 