Dhameystir weedhan soo socota: Markii uu ka tagay Alabama isaga iyo ciidankiisa yar, Reno waxaa si ku meel gaar ah loogu magacaabay inuu hoggaamiyo Fort Leavenworth Arsenal ilaa loo magacaabay brigadier general of volunteers dayrta 1861. Waxaa loo wareejiyay Virginia, wuxuu qabtay amarkii guutada 2aad, Burnside Expeditionary Force, wuxuuna si dhakhso leh u abaabulay shan guuto. Guutada 2aad waxay ka qayb gashay duulaankii North Carolina ee Major General Ambrose Burnside laga bilaabo Febraayo ilaa Luulyo 1862. Reno wuxuu noqday taliyaha qeybta IX Corps, oo qayb ka noqday Ciidanka Potomac. Dagaalkii Waqooyiga Virginia, Reno wuxuu si firfircoon uga soo horjeestay saaxiibkiis iyo saaxiibkiis Stonewall Jackson intii lagu jiray Dagaalkii Labaad ee Bull Run iyo
Dagaalkii Chantilly Reno waxaa loo magacaabay sarkaal sare 20kii Agoosto, 1862. (Hormarkan waxaa la xaqiijiyay kadib 9 Maarso 1863, iyadoo taariikhda darajada la aasaasay 18 Luulyo 1862.) Burnside wuxuu noqday taliyaha garabka midig ee Ciidanka Potomac bilowgii Ololaha Maryland bishii Sebtember, isagoo Reno u sareeyay taliska IX Corps laga bilaabo Sebtember 3.