The Irish Brigade of the Union Army fights in the Battle of Antietam, one of the most famous battles of the American Civil War, on September 17, 1862. The battle has the sad distinction of being the bloodiest single day of fighting in America’s bloodiest war. Combined casualties at the Battle of Antietam are 26,134. Few regiments suffered more than the Irish Brigade.

The Irish Brigade is the brainchild of their commanding officer Thomas Francis Meagher. The former Young Ireland rebel, creator of the Irish Tricolor of green, white and orange, escaped political prisoner, lawyer, newspaper editor and politician forms the brigade with the twin objectives of gaining respect for the Irish by their patriotism for their adopted country and developing a nucleus for a future fight for Ireland’s freedom. The Brigade is formed of the almost exclusively Irish American 69th, 63rd and 88th New York and the “honorary Irish” of the 29th Massachusetts. The regiments of the Irish Brigade had already earned a formidable reputation as a crack unit, having distinguished themselves in every battle of the earlier Seven Days Battles. It is small wonder, many in the Brigade’s ranks had already distinguished themselves in the Mexican-American War or in fighting with the Papal forces in Italy against Giuseppe Garibaldi.

The Union Army is already heavily engaged, when the Irish Brigade is ordered to advance through an open field to take an area of high ground. Subjected to accurate Confederate rifle fire as they cross the field, the Brigade marches on in disciplined order, the National and the famed Green Regimental Colors (flags) fluttering overhead. When they encounter a fence across their line of march, eighty volunteers rush forward to knock it down, rather than see the whole Brigade slowed by the obstacle and exposed to fire. Over half of these volunteers are killed. Seeing the Irish continue to press forward, the Confederates fall back as the Irish advance up the hill.

What no one on the Union side knows is that on the other side of the hill is a farmer’s dirt road that years of rain has eroded into a ditch five feet below the surrounding ground level. The sunken road is a perfect rifle pit and is filled with Colonel John Brown Gordon’s Georgians. As the Irish crest the hill, they are met with a volley that decimates the Brigade, including killing or wounding every single standard-bearer. Seeing the flags fall from across the field, an aide to Union General George B. McClellan exclaims, “The battles lost, the Irish are fleeing!” only for McClellan to respond, “No, the flags are raised again, they are advancing.” Eight successive standard-bearers of the 69th New York alone fall that day as men pick up the flags from fallen comrades. Captain Patrick Clooney, though wounded himself, snatches up the colors from the 88th’s fallen standard-bearer only to be killed by multiple shots, the Green Flag wrapping around him like a shroud befitting a hero. Another standard-bearer, the staff of his Irish Brigade flag snapped in two by a rifle shot, drapes the flag over his shoulder like a sash and continues to move forward, personifying the Gaelic phrase on the flag he is carrying “Riamh Nar Dhruid O Spairn lann”, “Who never retreated from the clash of spears.”

The fire of the Confederates is so intense that the Irish Brigade cannot advance, but they do not flee either. Despite the failure of promised reinforcements that never materialize, the Brigade pours “Buck and Ball” (a 69-caliber ball and three 30 caliber buckshot) into the enemy at 300 paces, turning the “Sunken Road” into “Bloody Lane.” When their ammunition is depleted, the remnants of the Brigade, with drill ground precision, form and march back to the Union lines. The Irish Brigade never “ran” from the enemy. Another Union unit takes the “Bloody Lane,” but most credit the punishment that the Irish Brigade inflicted on the enemy, at a terrible cost to themselves, with making it possible. The New York Regiments take over 50% casualties. The Irish Brigade is now no bigger than a single regiment. As the depleted ranks of the 88th march passed, Union Major General Israel Bush Richardson salutes as it passes with the words “Bravo 88th, I shall never forget you!”

During the course of the War, the Irish Brigade suffers over 4,000 casualties, more men than the Brigade ever had at any one time. The Fighting 69th loses more men than any other New York regiment. The Battle of Antietam is remembered as the Union victory that allows President Abraham Lincoln to issue the Emancipation Proclamation, which frees the slaves in the Confederate states. It is all too often forgotten that this emancipation was secured in no small part with the blood of Irish immigrants, immigrants who were denied civil rights in their own country and faced discrimination in their adopted county before and after the Civil War.

In thinking of the Civil War, all Americans should remember the words of a defeated Confederate Officer to his Union counterpart at Appomattox, “You only won as you had more Irish than we did.”

(Credit: “The Irish Brigade at Antietam” by Neil F. Cosgrove, October 17, 2009)