James Dunne

He Dragged a Cannon to the Enemy’s Embrasure

James Dunne was born in Detroit, Michigan, on December 26, 1840. By the time the United States descended into civil war, he had made his way to Chicago, Illinois, the city to which his military service would later be officially credited. In 1862 he entered Union service with the Chicago Mercantile Independent Battery Light Artillery, an Illinois artillery organization raised in Chicago for three years of wartime duty.

The battery was mustered into service on August 29, 1862, and soon left Illinois for the western theater. Its soldiers became part of the Union campaigns aimed at breaking Confederate control of the Mississippi River. Their early operations included service around Memphis and participation in campaigns through Mississippi and Arkansas before the unit became deeply involved in Major General Ulysses S. Grant’s drive against Vicksburg.

During the months leading to Vicksburg, the Chicago Mercantile Battery fought through an increasingly demanding series of operations. It participated in the fighting at Port Gibson on May 1, 1863, then served during the Battle of Champion Hill on May 16 and the Battle of Big Black River Bridge the following day. Those victories pushed Confederate forces back into the defenses surrounding Vicksburg, where Grant’s army prepared to attack one of the most important strongholds on the Mississippi River.

By May 1863, Dunne was serving as a corporal in the battery. Vicksburg’s fortifications presented a formidable obstacle. Confederate troops occupied earthworks, redoubts, lunettes, and other prepared positions covering the approaches to the city. Grant attempted to break those defenses by direct assault, first on May 19 and again on May 22.

It was during the second assault that Dunne performed the action for which he would eventually receive the Medal of Honor.

On May 22, the Chicago Mercantile Battery supported the Union attack against the Confederate works. One of the battery’s guns was moved forward under extraordinary circumstances. Dunne and other soldiers physically dragged the cannon by hand toward the enemy position, bringing it to within a few yards of a Confederate lunette along the Baldwin’s Ferry Road sector.

The official Medal of Honor citation preserves the essential facts with remarkable directness: Dunne “carried with others by hand a cannon up to and fired it through an embrasure of the enemy’s works.”

Moving an artillery piece in that manner required the men to abandon the relative security of a normal firing position and bring the weapon dangerously close to the Confederate fortifications. The gun was positioned near the enemy work and served against it for several hours. Dunne’s role in hauling and firing the cannon placed him among a small group of artillerymen whose conduct during the assault became one of the most distinctive episodes associated with the Chicago Mercantile Battery at Vicksburg.

The May 22 assault did not break the Confederate defenses. Grant abandoned further large-scale attempts to storm the city and instead tightened the siege. For weeks, Union artillery and infantry maintained pressure around Vicksburg while naval forces controlled the river. On July 4, 1863, the Confederate garrison surrendered. The victory, combined with Union success elsewhere along the Mississippi, dealt a major strategic blow to the Confederacy and gave the Union effective control of the river.

Dunne’s war did not end at Vicksburg. The Chicago Mercantile Battery continued campaigning after the city’s surrender. It participated in operations around Jackson, Mississippi, and later moved into Louisiana and Texas. In 1864 the battery served during the Red River Campaign, including the Battle of Sabine Cross Roads, also known as Mansfield, where Confederate forces defeated the Union army and captured a number of men from the battery.

The unit continued serving in the Department of the Gulf through the final period of the Civil War. After duty in Louisiana, the Chicago Mercantile Battery eventually returned north and was mustered out in Chicago on July 10, 1865. Dunne completed his service with the verified rank of corporal.

Recognition for his extraordinary action at Vicksburg came more than thirty years after the battle. On January 15, 1895, James Dunne was presented with the Medal of Honor for what he had done on May 22, 1863. Several other members of the Chicago Mercantile Battery were also recognized for taking part in the same remarkable artillery action, preserving the episode as a defining moment in the battery’s Civil War history.

The Medal of Honor had been established during the Civil War and became the United States’ highest military decoration for valor. In Dunne’s case, the award did not depend on an elaborate narrative or later legend. Its citation focused on a single, clearly documented act: helping carry a cannon forward by hand and firing it through an embrasure in the Confederate defenses at Vicksburg.

Dunne lived for another two decades after receiving the decoration. He died in Chicago on February 13, 1915, at the age of seventy-four. He was buried at Calvary Cemetery in Evanston, Illinois, bringing his life to a close in the region with which his military service had long been associated.

His legacy remains inseparable from the desperate Union assault of May 22, 1863. In a battle dominated by fortified earthworks and artillery fire, Corporal James Dunne and his comrades took an artillery piece forward by hand to a position almost directly against the Confederate defenses. More than three decades later, the Medal of Honor formally preserved that act of courage.

From Detroit to Chicago and from the campaigns of the western theater to the defenses of Vicksburg, Dunne’s Civil War service reflected the demanding experience of a Union artilleryman. Yet one moment stands above the rest: a corporal helping drag a cannon toward an enemy embrasure and continuing the fight from a position few artillerymen would normally be expected to occupy.