 Then, however, McClellan came under extreme criticism in the press and Congress when it was learned that Johnston's forces had not only slipped away unnoticed, but had for months fooled the Union Army with logs painted black to appear as cannons, nicknamed Quaker Guns.Congress's joint committee visited the abandoned Confederate lines and radical Republicans introduced a resolution demanding the dismissal of McClellan, but it was narrowly defeated by a parliamentary maneuver.The second crisis was the emergence of the Confederate ironclad CSS "Virginia", which threw Washington into a panic and made naval support operations on the James River seem problematic.