Additional Union reinforcements from the VI and XIX Corps arrived overnight and were placed in reserve behind the line. The skirmishing continued into July 12, when Early finally decided that Washington could not be taken without heavy losses which would be too severe to warrant the attempt. Union artillery from Fort Stevens attempted to clear out Confederate sharpshooters hidden in the buildings and fields in front of the fort; when the artillery fire failed to drive them off, the VI Corps brigade of Daniel Bidwell, supported by Oliver Edwards' brigade and two Veteran Reserve Corps regiments, attacked at about 5 p.m. The attack was successful, but at the cost of over 300 men.