 Munyori weU.S. weNavy Gideon Welles akadana Alert kudzokera kuRwizi rwePotomac kuti asimbise mauto aifanira kusangana naLee, asi ngarava yaigadziriswa kuNewport News, Virginia, uye haina kukwanisa kutanga kufamba kusvikira masoja eUnion amisa Lee paAntietam Creek. Nokusarudza kwaLee kuenda kuVirginia, kudikanwa kwe Alert muPotomac kwakanyangarika, uye akasara muNorth Atlantic Blockading Squadron. 