HistoricSiteMarkers
Civil War

Gettysburg Campaign

Mount Joy Township, Adams County, Pennsylvania

Marker Inscription

The Union Army 12th Corps arrived here the afternoon of July 1, 1863; and later moved into battle line on Culp's Hill. On July 2, the 6th Corps arrived by this same road, and the 5th Corps by the Hanover Road.

Erected by Pennsylvania Historical and Museum Commission

The Story

As the fighting opened, Union reinforcements streamed toward Gettysburg along these country roads. The 12th Corps reached this point on the afternoon of July 1, 1863, and soon took position on Culp's Hill, the anchor of the Union right. Over the next day the 6th and 5th Corps followed, filling out the fishhook line that would hold against Lee's attacks.

Why it matters

The rapid concentration of the Union army on strong high ground was the foundation of the victory at Gettysburg.

The story behind this marker

AI context

The era

In the first days of July 1863, the war arrived in full on the roads around Gettysburg. The Union's Army of the Potomac, strung out across the Pennsylvania and Maryland countryside, rushed toward the town as the fighting began, each corps following whatever road brought it fastest to the field.

The country here was a network of farm lanes and turnpikes linking small communities, and in those July days it carried a steady stream of soldiers, wagons, and artillery. Ordinary roads became lifelines, delivering fresh troops to a battle that grew by the hour.

Above the town rose a set of hills and ridges that would decide the battle. Getting men onto that high ground quickly — before the enemy could take it — was the urgent task of that first afternoon and the days that followed.

People & events

On the afternoon of July 1, 1863, the Union Twelfth Corps reached this point and soon moved into position on Culp's Hill, anchoring the right end of the army's line. Holding that hill was vital: it guarded the army's flank and helped lock the defensive position in place.

The reinforcements kept coming. On July 2 the Sixth Corps arrived along this same road, while the Fifth Corps came up by the Hanover Road. Each fresh body of troops strengthened the Union line as Confederate attacks pressed against it.

Together these arrivals filled out the long, curving defensive position that became famous for its shape — a line that bent around the hills and ridges south of town and held firm against repeated assaults.

Its place in the American story

The rapid concentration of the Union army on strong high ground was the foundation of the victory at Gettysburg, the battle widely seen as the turning point of the Civil War. Men who marched these roads helped build the line that Lee's army could not break.

What this site records is the unglamorous but decisive work of reinforcement — corps arriving in time, taking position, and making a defensive line solid. Battles are won as much by who reaches the field, and when, as by the charges that grab the headlines.

The hills those troops occupied and the line they completed held through days of hard fighting. The roads that fed them into position were, in a real sense, the arteries of the Union victory.

If you visit

Stand on this road and think of it as a conveyor belt of reinforcements — corps after corps tramping toward the fight, then filing off to take their places on the heights. The quiet lane carried much of the strength that held the line.

The marker is one in a series tracing how the armies reached Gettysburg, so it fits naturally into a driving tour of the approach routes. Following these roads toward the battlefield gives you a sense of how the Union position was assembled piece by piece.

As you near the hills south and east of town, look for the high ground that made this all worth the hurry. Imagining tired soldiers marching up to hold those slopes turns an ordinary country road into a vivid chapter of the battle's story.

Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.

Plan your visit

Nearby

Make a day of it — museums, food, and places to stay near this marker.

Museums & culture

Attractions

Food & drink

Places to stay

Places data © OpenStreetMap contributors. Hours and details change — call ahead.

Own a business near here? Add it to the map.

Related events

  • · Gettysburg Campaign
  • · Battle of Gettysburg

Themes & tags

Civil WarLandmark

Nearby & related markers

61st PA Smith

Mount Joy Township, PA

This tablet marks where the 61st Pennsylvania Infantry stood at Gettysburg, the July 1863 clash that halted Lee's invasion of the North. After a grueling 37-mile forced march, the regiment reached the field late on July 2nd as part of the 6th Corps — the army's largest reserve — and held this position through the close of battle on July 3rd. Such rapid marches by fresh troops were exactly what let the Union army mass overwhelming strength at the decisive moment.

Civil War

US 21st PA Cavalry Co B Bingham

Cumberland Township, PA

A short distance from here, on June 26, 1863 — days before the great battle opened — Private George M. Sandoe of Captain Robert Bell's independent Adams County cavalry company was shot and killed as Confederate forces advanced on Gettysburg. His unit was later folded into Company B of the 21st Pennsylvania Cavalry, and Sandoe is remembered as the first Union soldier killed at Gettysburg.

Civil War

2nd US Artillery Battery B & L Heaton

Cumberland Township, PA

This marker stands on the Gettysburg battlefield, where in July 1863 the Army of the Potomac turned back Robert E. Lee's second invasion of the North in the bloodiest battle ever fought in America. It records the position of Batteries B and L of the 2nd United States Artillery — horse artillery attached to the Cavalry Corps, armed with six 3-inch ordnance rifles under Lieutenant Edward Heaton. Mobile guns like these rode with the cavalry, unlimbering quickly to support fast-moving mounted operations on the army's flanks.

Civil War

US 28th PA Flynn

Cumberland Township, PA

The 28th Pennsylvania Infantry took this position around 8 a.m. on July 2, 1863, spreading out as skirmishers and trading fire with the enemy through the day before rejoining its brigade that evening. Skirmishers fought ahead of the main line, probing the enemy and screening the army's movements — dangerous, often overlooked work. The regiment's day here formed part of the wider struggle on this side of the Gettysburg field.

Civil War