Tego samego dnia wieczorem do stolicy przybyły dodatkowe oddziały armii federalnej wezwane przez generała Granta.
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W swoich pamiętnikach broniący Waszyngtonu generał Grant napisałIf Early had been but one day earlier he might have entered the capital before the arrival of the reinforcements I had sent. Whether the delay caused by the battle amounted to a day or not, General Wallace contributed on this occasion, by the defeat of the troops under him a greater benefit to the cause than often falls to the lot of a commander of an equal force to render by means of a victory. Personal Memoirs of U.S. Grant, str 306.:
Z kolei generał Early tak tłumaczył swoją niezdolność zdobycia WaszyngtonuSome of the Northern papers stated that, between Saturday and Monday, I could have entered the city; but on Saturday I was fighting at Monocacy, thirty-five miles from Washington, a force which I could not leave in my rear;