http://ghostsofdc.org/2013/08/21/map-of-rebel-attack-on-washington/
Scale seems off, but the general relationship of the troops and forts might allow for a good ACW scenario.
Phil Sheridan soon sorted 'im out.
A little background on Jubal's venture.
http://www.academia.edu/1111202/From_Lynchburg_to_the_Capital_General_Jubal_Earlys_Raid_on_Washington