Buuxi weedha soo socota: Bilowgii Dagaalkii Sokeeye, Mansfield wuxuu amar ku bixiyay Waaxda Washington (Abriil 27 - Ogosto 17, 1861), waxaana loo dalacsiiyay brigadier general May 6, 1861. General-in-chief Winfield Scott ayaa ku taliyay Mansfield in uu hoggaamiyo ciidanka mutadawiciinta ee Washington D.C. gugaas, laakiin amarku wuxuu u aaday Irvin McDowell. Mansfield looma tixgelin doorashada ugu fiican sababo la xiriira da'diisa oo aad u sareysa iyo shaki ku saabsan ciidamada mutadawiciinta ah iyo riixitaanka maamulka ee wadista degdegga ah ee Richmond ee joojin doonta dagaalka dhowr bilood gudahood, sidoo kale wuxuu la'aa taageere siyaasadeed oo ku sugan Washington. Ka dib guushii Midowga ee Bull Run, George McClellan ayaa loo magacaabay inuu hoggaamiyo dadaalka dagaalka ee Tiyaatarka Bariga iyo rajada Mansfield ee hoggaanka ciidanka ayaa mar kale burburtay. McClellan sidoo kale ma uusan u soo bandhigin amar ku saabsan Ciidanka cusub ee loo sameeyay ee Potomac. Mansfield wuxuu ku sugnaa
Hatteras Inlet, North Carolina, bishii Oktoobar, kadib dagaalkii halkaas ka dhacay Benjamin Butler bishii Agoosto. Wuxuu ahaa taliyaha guutada ee Waaxda Virginia laga bilaabo Maarso ilaa Juun 1862. Waxqabadkiisii dagaalka kaliya ee mudadaas wuxuu ahaa rasaasaynta bateriyada xeebta ee ka socota Hampton Roads ee ka dhanka ah "CSS Virginia" ee dagaalkii badda ee ka dhanka ahaa "USS Monitor" bishii Maarso 9, 1862. Ilaa dayrta 1862, Mansfield wuxuu amar ku bixiyay Qaybta Suffolk ee Qaybta VII ee Waaxda Virginia agagaarka Suffolk.