Why Civil War Battles Have Two Names: Antietam and Sharpsburg

Some Civil War battles carry two names because opposing armies identified the same fighting with different nearby landmarks. Union usage often favored streams or other geographic features. Confederate usage often favored towns or buildings. Antietam and Sharpsburg describe one battle, as do Bull Run and Manassas.

That pattern offers a useful starting point. It does not explain every name or cover every battle. The National Park Service’s history of Manassas describes the familiar geographic naming distinction.

For readers, those paired names can make an already complicated war harder to follow. For family researchers, they can hide an important connection. A soldier’s record might mention Sharpsburg while a modern book calls the battle Antietam.

The names differ. The battlefield does not.

Are Antietam and Sharpsburg the same battle?

On September 17, 1862, Union and Confederate armies fought near Sharpsburg, Maryland. Antietam Creek supplied the name commonly associated with Union accounts. Sharpsburg supplied the name used in the South.

The National Park Service’s Antietam foundation document identifies both names and the battle’s date. Its battlefield map also places the town and creek beside the fighting.

Neither name describes a separate engagement. Both refer to the battle involving Robert E. Lee’s Army of Northern Virginia and George McClellan’s Army of the Potomac.

More than 23,000 soldiers were killed, wounded, or missing. That total describes casualties, not deaths alone. Antietam remains the bloodiest single-day battle in American history.

Lee’s withdrawal ended his Maryland invasion. The result also gave Abraham Lincoln the opportunity to issue the preliminary Emancipation Proclamation.

A name can point us toward a creek or town. Understanding the battle requires attention to its people, decisions, and consequences.

My novel Antietam: From Secession to the Bloodiest Day follows fictional lives through this period. The story offers another way to explore the human pressures behind the historical events.

Bull Run and Manassas: remember the number

The same naming pattern appears in northern Virginia. Union accounts used Bull Run, the nearby stream. Confederate accounts used Manassas, the nearby town and railroad junction.

The National Park Service explains those choices in its account of Manassas and Washington’s defenses.

Here, an extra detail matters: two major battles took place in the area.

First Bull Run and First Manassas identify the battle of July 21, 1861. Second Bull Run and Second Manassas identify the later battle in August 1862. The alternate names do not turn two battles into four.

A record that says only “Manassas” needs closer examination. Look for a date before deciding which battle it describes. A place name alone cannot settle that question.

The stream and railroad junction also explain why geography belongs in the story. Armies crossed waterways, defended approaches, and fought for transportation routes. Their chosen names preserve different points on that landscape.

Shiloh shows why the rule needs exceptions

Shiloh offers a useful caution against treating every Confederate name as a town name. The battlefield’s church supplied the name Shiloh. Pittsburg Landing, the river landing used by Union forces, supplied another name for the same battle.

The fighting took place on April 6 and 7, 1862. The National Park Service’s Shiloh history describes the landing, church, and battle.

Shiloh became a widely used name. Today, the national military park bears it. Modern use of a historic name does not automatically reveal a writer’s allegiance.

Other paired names also resist a tidy creek-versus-town formula. Pea Ridge is also known as Elkhorn Tavern. The National Park Service lists both names. The tavern, rather than a town, supplied the alternate name.

The safest approach is simple: verify the specific battle. Use the general pattern as a clue, not a guarantee.

How do you research a battle with two names?

Start with three pieces of information: the name, the date, and the state. Together, they offer a stronger identification than any name alone.

Search for both versions. Try “Antietam September 1862” and “Sharpsburg September 1862.” When researching Manassas, include “First” or “Second” whenever the date supports that choice.

Then compare what the sources describe. Do the commanders, location, and dates match? If they do, the sources may describe the same engagement under different names.

For an ancestor’s service, add the regiment to your notes. A soldier’s unit helps connect a personal record with the larger campaign. Never assume participation solely because a regiment appears somewhere in a campaign history.

My Civil War research tools provide starting points for exploring soldiers and battles. Keep the original wording from each record, then add the alternate name beside it.

That habit helps you connect records that use different names.

Two names, one place to begin

A battlefield name is an entry point. It helps us locate an event, but it cannot explain everything that happened there.

Knowing both names makes reading, research, and battlefield visits easier. It also keeps us from counting the same battle twice.

Explore the 384-Battle Index to follow the war through its battlefields. Choose a familiar battle, check its date, and look for an alternate name in historical sources.

For the fictional stories that accompany this history, visit the Steel and Honor reading guide.

One creek. One town. Two names. The same people caught in the same war.