On 4 April 1862, Major General George McClellan marched his 121,500-strong Army of the Potomac from Fort Monroe toward Richmond. Blocking his path were the Warwick-Yorktown Line fortifications & the Confederate ironclad CSS Virginia. Despite outnumbering Magruder almost four to one, McClellan was tricked by Magruder’s bluff of strength & halted his advance. Yorktown, the scene of Washington’s 1781 victory, was once again besieged. It was the Civil War’s first siege & lasted for 29 terrible days.