 McClellan was thus required to give chase without any benefit of the heavy artillery so carefully amassed in front of Yorktown.The Battle of Williamsburg on May 5 is considered a Union victory—McClellan's first—but the Confederate army was not destroyed and a bulk of their troops were successfully moved past Williamsburg to Richmond's outer defenses while the battle was waged and for several days thereafter.McClellan had also placed hopes on a simultaneous naval approach to Richmond via the James River.