 Ensign Keogh did not survive the daring dash into the French ranks.It was popularized outside Ireland during the American Civil War by the Army of the Potomac's Irish Brigade – composed of the 69th New York Volunteer Infantry (NYVI) or "Fighting 69th", the 63rd & 88th NYVI, and later the 116th Pennsylvania and 28th Massachusetts Infantry regiments.A variant transliteration of the motto, 'Faj an Bealac!'