historyanalysisNLM Circulating Now1862 · Sharpsburg, Maryland, USA
The Ambulances of Antietam
At the Battle of Antietam in September 1862, the Union army was the first to try a system that organized battlefield evacuation. Before this, wounded soldiers were often left for days, and at Bull Run in 1861 some crawled back to Washington on their own. Jonathan Letterman's plan gave each regiment dedicated ambulances, each crewed by a driver and two litter-bearers, to carry the wounded from the front to a regimental aid point and then to hospitals further back. Three hundred ambulances cleared the field overnight, and at Fredericksburg nearly 1,000 ambulances evacuated over 9,600 men in under 12 hours.
Before 1862 ambulances were often driven by civilians or band members with no training, and wounded men waited until wagons could be gathered. Letterman's approach split the job into stages: light ambulances collected men at the front, and larger ones carried them from a regimental point to field and general hospitals. Dedicated crews and a fixed chain of handoffs meant casualties were treated early and moved steadily.
This echeloned system of care from the point of injury is the ancestor of modern emergency medicine. Congress adopted the plan for the whole Union Army in 1864, and its principles still shape how casualties are moved today.
Organized evacuation grew out of the poor performance at Bull Run, where public reports of suffering spread and affected morale. Later wars adopted tiered evacuation chains, a pattern that became standard military medicine.
U.S. National Library of Medicine
Illustrative photo · Thure de Thulstrup / Adam Cuerden, Public domain, via Wikimedia Commons
