Burnside was soon defeated at the Battle of Fredericksburg on December 13, 1862, when more than 12,000 Union soldiers were killed or wounded during repeated futile frontal assaults against Marye's Heights.
Burnside blev snart besejret i Slaget ved Fredericksburg den 13. december 1862, hvor over 12.000 Unionssoldater blev enten dræbt eller såret under gentagne udsigtsløse frontalangreb mod Marye's Heights.