The devastating Union attack at Cold Harbor resulted in staggering casualties, with 7,000 men lost against only 1,500 inflicted on the Confederates. As the Union army faced relentless suffering under the sun, the stark realization of the battle's futility haunted leaders like Ulysses, who later expressed deep regret over the ill-fated assault. Despite the heavy toll, the Confederate defense marked another tactical victory for Bobby, yet the Union's march southward remained unstoppable.