1st Delaware Infantry Regiment (Civil War)

The 1st Delaware Infantry Regiment was among the first military units organized by the state of Delaware during the American Civil War. Formed in the spring of 1861 under the command of Colonel John Haslet, the regiment drew its volunteers primarily from Kent, Sussex, and New Castle counties before being mustered into federal service. It served in the Eastern Theater of the war, participating in several major engagements including the Battle of Antietam and the Battle of Gettysburg, where it fought as part of the II Corps of the Army of the Potomac. The regiment's service reflected Delaware's strong, if complicated, commitment to the Union cause despite the state's small population and agrarian economy. Its records are preserved at the Delaware Public Archives, the Delaware Historical Society, and the National Archives and Records Administration.

History

Organization and Muster

The 1st Delaware Infantry Regiment was organized in direct response to President Abraham Lincoln's call for 75,000 volunteers following the Confederate attack on Fort Sumter in April 1861. Delaware, though a border state that permitted slavery, held strong Unionist sympathies among much of its population, and recruitment proceeded quickly. Colonel John Haslet, a physician and militia officer from Kent County, was appointed to command the regiment. He proved an energetic and capable organizer.

The regiment assembled and drilled on The Green in Dover, the state's capital, before marching off to war. That detail matters: the commonly cited "Delaware State Armory" was not the regiment's primary mustering site. The regiment was mustered into federal service in 1861 and ultimately mustered out at Christiana, Delaware, not Dover, at the conclusion of its service. Dover's access to the Delaware Railroad facilitated the movement of troops northward toward Philadelphia and onward to the front, compressing what might otherwise have been a slow deployment into a matter of days.

Early Service, 1861 to 1862

After mustering in, the regiment moved into the Eastern Theater and was assigned to the Army of the Potomac. Its early service in 1861 involved garrison and picket duties typical of newly organized Union regiments during the war's first year. The Peninsula Campaign, sometimes incorrectly dated to the summer of 1861, did not begin until the spring of 1862 under General George B. McClellan. The regiment participated in that campaign as Union forces pushed toward Richmond along the Virginia Peninsula, enduring the hardships of campaigning in Virginia's swampy terrain alongside disease, inadequate supply, and Confederate resistance.

Casualties from illness during this period rivaled those from combat. Many soldiers came from rural Delaware farms and had limited prior exposure to the crowded, unsanitary conditions of military camps. Letters home, preserved in the Delaware Historical Society's collections, describe outbreaks of typhoid and dysentery that thinned the regiment's ranks before a single major battle had been fought.

Battle of Antietam, September 1862

The regiment's most significant early combat came at the Battle of Antietam on September 17, 1862, the bloodiest single day of the entire war. Fighting as part of the II Corps, the 1st Delaware Infantry entered the action along the center of the Union line and suffered severe casualties. The regiment's performance at Antietam drew notice from senior officers. Colonel Haslet's leadership earned commendation from Army commanders. Specific casualty figures for the regiment at Antietam are recorded in Dyer's Compendium of the War of the Rebellion, which remains the standard reference for Union regimental statistics.

It's worth noting that Antietam, for all its horror, was strategically decisive. It gave Lincoln the political footing he needed to issue the Emancipation Proclamation. Delaware soldiers were present at that turning point.

Fredericksburg and Chancellorsville

Between Antietam and Gettysburg, the regiment also saw action at the Battle of Fredericksburg in December 1862 and the Battle of Chancellorsville in May 1863. Fredericksburg was a Union disaster: repeated assaults up the slopes of Marye's Heights produced catastrophic losses across the Army of the Potomac, and the 1st Delaware Infantry was among the units that absorbed those casualties. Chancellorsville, though a Confederate tactical victory, similarly punished II Corps regiments that bore the weight of sustained fighting. By the time the regiment reached Gettysburg, it had been through nearly two years of hard campaigning and was considerably reduced from its original strength.

Battle of Gettysburg, July 1863

At Gettysburg in July 1863, the 1st Delaware Infantry served with the 1st Brigade, 3rd Division, II Corps, not the XII Corps as has sometimes been erroneously reported. The II Corps, under General Winfield Scott Hancock, held the center and left-center of the Union line along Cemetery Ridge, not the far left flank. The regiment fought in the brutal close-quarters combat that defined the Gettysburg fighting, particularly during the Confederate assaults on July 2 and 3. Busey and Martin's detailed statistical study provides specific strength and casualty figures for the regiment during those three days. The regiment's stand on Cemetery Ridge contributed to repelling Pickett's Charge on July 3, one of the war's most consequential defensive actions.

By the end of the engagement, the regiment had sustained significant losses. Three years of war had ground it down from a full regiment of roughly 1,000 men to a fraction of that strength.

Muster-Out and Disbandment

The regiment was mustered out of federal service at Christiana, Delaware, at the war's conclusion. Surviving members returned to farms, workshops, and small businesses across Kent, Sussex, and New Castle counties. The regiment's records, including muster rolls, order books, and compiled military service records, are held at the National Archives and Records Administration and at the Delaware Public Archives in Dover. Those records remain the primary source for researchers seeking detailed information about individual soldiers and unit operations.

Geography

Delaware's geography shaped the 1st Delaware Infantry's formation and movement in practical ways. The state is small, measuring roughly 96 miles from north to south and no more than 35 miles across at its widest point, but it occupies a strategic position bordering Maryland to the south and west, Pennsylvania to the north, and the Delaware River and Delaware Bay to the east. It does not directly border the Chesapeake Bay. That position made Delaware a natural transportation corridor linking the mid-Atlantic states. Dover, the state capital and the regiment's primary assembly point, sits near the center of the Delaware Peninsula and had access to the Delaware Railroad, which connected southward to the peninsula's lower counties and northward toward Wilmington and Philadelphia.

Wilmington, Delaware's largest city, served as the regiment's main logistical gateway to the broader Union supply network. From Wilmington, troops and materiel moved easily by rail to Philadelphia and by steamboat along the Delaware River. The state's coastal ports, including Lewes at the mouth of Delaware Bay, supported Union naval operations in the region. The flat terrain of the coastal plain meant that mobilizing and transporting troops within the state presented fewer logistical obstacles than in more mountainous regions. Still, the state's limited industrial capacity meant that much equipment had to be sourced from Pennsylvania manufacturers rather than from local suppliers.

Culture

The cultural landscape of Delaware during the Civil War was complex. The state's Quaker heritage, concentrated especially in the northern counties, emphasized pacifism and moral opposition to slavery, but Quaker communities didn't speak with one voice on the question of military service. Some meeting-houses encouraged men to find non-combat ways to support the Union, such as nursing or supply work, while others quietly accepted that members might enlist. That tension played out in real families across the state.

Delaware's agricultural economy shaped the regiment's composition more directly than any ideological current. Most soldiers came from farming backgrounds. Manual labor, endurance, and familiarity with outdoor conditions all transferred reasonably well to military life, even if nothing fully prepared men for sustained combat. The regiment's relatively small size, a product of Delaware's limited population, meant that personal connections ran throughout the unit. Neighbors served alongside neighbors. A casualty at Antietam was likely known to half the families in a given county. Letters and diaries preserved in the Delaware Historical Society's collections document this intimacy and the grief that accompanied it.

Notable Members

The 1st Delaware Infantry Regiment included men who went on to play roles in Delaware's post-war public life, though researchers should approach undocumented biographical claims with caution given the limited secondary literature on the regiment. Colonel John Haslet, the regiment's commanding officer, is the most historically significant individual associated with the unit. His leadership from the regiment's organization through its early campaigns established the unit's identity and reputation.

Other members of the regiment returned to civilian life as farmers, tradesmen, teachers, and local officials. Veterans' organizations formed in Delaware after the war preserved the regiment's memory and advocated for pension benefits and medical care for former soldiers. The regimental flag, a physical artifact of the unit's service, has attracted scholarly attention as an object that carries the material history of the regiment's campaigns. Detailed biographical information on individual enlisted men and junior officers is best obtained through the compiled military service records held at the National Archives.

Education

The regiment's history has been integrated into Delaware's educational landscape at multiple levels. The Delaware Historical Society offers educational programs built around primary source materials including soldier diaries, letters, muster rolls, and photographs drawn from the regiment's service. These programs allow students to work with original documents rather than textbook summaries, a pedagogical approach that makes the human cost of the war concrete rather than abstract.

The University of Delaware's Department of History has produced scholarship addressing the regiment's campaigns and Delaware's broader Civil War experience. Public libraries across the state hold microfilmed regimental records and published regimental histories. The Delaware Public Archives in Dover maintains an accessible collection of Civil War-era state records, including correspondence between the governor's office and federal military authorities, that illuminate the political and logistical challenges of raising and sustaining a regiment during wartime. Researchers seeking the most complete picture of the regiment's service should consult those archives alongside the National Archives holdings and Dyer's Compendium.

Economy

Delaware's economy in 1861 was predominantly agricultural. Wheat, corn, and peach farming dominated the lower counties, while Wilmington and its surroundings supported a modest manufacturing sector that included iron works and leather goods production. Most men who enlisted in the 1st Delaware Infantry came from farming families that could spare a son or brother to the war effort only at real economic cost. Farms operated with fewer hands. Families absorbed the labor loss as best they could.

The war did stimulate certain sectors. Demand for leather goods, textiles, and processed food increased as the federal government contracted with regional suppliers. Wilmington's manufacturing base expanded modestly during the war years, and the Delaware Railroad carried heavier freight loads as military supply chains ran through the state. These were not transformative changes, but they began shifting the state's economic center of gravity toward Wilmington and away from the purely agrarian southern counties. That shift accelerated after the war and shaped Delaware's industrial development through the late nineteenth century.

Parks and Recreation

Several parks and historical sites in Delaware preserve the memory of the regiment and the state's Civil War experience. The Delaware State Park system includes interpretive exhibits at multiple locations that address the state's role in the conflict. Markers and plaques at sites connected to the regiment's organization and mustering provide context for visitors who want to follow the regiment's history on the ground.

The Delaware Historical Society maintains museum facilities in Wilmington that house artifacts, documents, and photographs related to the regiment's service. Visitors can examine objects that soldiers carried, wore, and used. Those exhibits connect the abstract facts of regimental history to individual human experience. Private historical organizations and local historical societies across Kent and Sussex counties also maintain records, photographs, and occasionally artifacts related to the regiment. Researchers planning visits to these sites are advised to contact institutions in advance to confirm access to specific collections.

Architecture

Several structures in Delaware retain connections to the regiment's history and to the broader Civil War era in the state. The Green in Dover, where the regiment assembled and drilled before departing for the front, remains a public space at the center of Delaware's capital city. It served similar functions for multiple Delaware military units across different wars and continues to be used for public gatherings.

Farmhouses and rural dwellings associated with soldiers who served in the regiment survive in scattered locations across Kent and Sussex counties, many still in private hands. These structures, typically modest mid-nineteenth century vernacular buildings, offer physical evidence of the agricultural world from which most of the regiment's men came. Monuments and memorials honoring Delaware's Civil War soldiers can be found in courthouse squares and cemeteries across the state. These monuments typically bear the names of men who served and died, and they remain maintained by local historical organizations and municipal governments. Together, Delaware's built environment tells a layered story of service, sacrifice, and memory that extends well beyond the regiment's years of active service.

Sources and Archives

Researchers studying the 1st Delaware Infantry Regiment have access to several important archival collections. The Delaware Public Archives in Dover holds state-level Civil War records including executive correspondence, muster documents, and military commission records. The National Archives and Records Administration holds compiled military service records and regimental order books for the regiment in Record Group 94.<ref>National Archives and Records Administration, Compiled Military Service Records, 1st Delaware Infantry Regiment, Record Group 94.