During the Battle of Antietam, medical advancements had a significant impact on care.

The unprecedented number of casualties highlighted the need for organized medical responses, leading to improvements in triage and field hospitals. Medical personnel utilized lessons learned from previous battles to better manage the treatment of wounds and disease. The experience prompted a push for reforms in military medicine, including the establishment of more systematic approaches to battlefield care and the importance of sanitation. These advancements laid the groundwork for future improvements in military healthcare during the Civil War and beyond.