Lee's decisions during the Battle of Gettysburg primarily Led to significant casualties for the Confederate Army.

His decision to pursue bold frontal attacks, particularly highlighted by Pickett's Charge, led to catastrophic losses. Lee misjudged the Union's defensive strength and the challenging landscape, factors that played a significant role in the failure of these offensives. The substantial casualties not only weakened the Confederate army but also lowered morale and reduced their effectiveness in later campaigns. This event represented a pivotal moment in the war, shifting the momentum away from the Confederacy.