Functioning as the 1st Regiment, Irish Brigade, 2nd Corps, Army of the Potomac throughout the Civil War, the regiment made history at Malvern Hill, Antietam, Fredericksburg, Gettysburg, Spotsylvania, Cold Harbor, Petersburg and Appomatox. According to legend, an exasperated General Jackson cursed them as part of "that damn brigade." Functioning as the 165th Infantry, 42nd Division (Rainbow Division) throughout World War I, the regiment helped turn back the last German offensive, counterattacked at the Ourq river, spearheaded one of Pershing's pincers at St. Mihiel, and helped break the Hindenburg Line in the Argonne Forest. Today, the regiment is known as 1st Battalion, 69th Infantry (Mechanized), New York Army National Guard.