Faugh a Ballagh (/ˌfɔːɡ ə ˈbæləx/ FAWKH ə BAL-əkh; also written Faugh an Beallach) is a battle cry of Irish origin, meaning "clear the way". The spelling is an 18th-century anglicization of the Irish language phrase Fág an Bealach [ˈfˠaːɡ ənˠ ˈbʲalˠəx], also written Fág a' Bealach. Its first recorded use as a regimental motto was by the 87th (Prince of Wales's Irish) Regiment of Foot (who later became the Royal Irish Fusiliers) in 1798. It remains the motto of the Royal Irish Regiment today.
It was adopted due to the blood curdling battle-cry of Sergeant Patrick Masterson as he tore into the French ranks, with Ensign Keogh, to capture the first French Imperial Eagle to be taken in battle – during the Battle of Barossa. He was then heard to cry 'Be Jabers Boys! I have the Cuckoo!' as he held it triumphantly aloft to rouse the spirits of his men. 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!' was inscribed on the regimental colors of the (Federal) 7th Missouri Volunteer Infantry, the "Irish Seventh", which fought in the Civil War's Western Theater as part of Grant and Sherman's Army of the Tennessee.
Faugh-a-Ballagh (foaled 1841 in Ireland) was a Thoroughbred racehorse. A brother to Birdcatcher, Faugh-a-Ballagh was sold to E. J. Erwin in 1842. He ran once as a two-year-old at the Doncaster's Champagne Stakes, finishing third to The Cure and Sorella. He then began his three-year-old season as the first Irish-bred horse to win the St. Leger Stakes, then beat Corranna in a match race. He won the Grand Duke Michael Stakes, then the Cesarewitch, and came second to Evenus at the Cambridgeshire. As a four-year-old, he finished second to The Emperor in the Emperor of Russia's Plate.
In 1855, Faugh-a-Ballagh was exported to France. There he sired Fille de l'air, the Epsom Oaks and French Oaks winner. He also sired the great stallion Leamington, that sired the American racehorse and leading sire Longfellow, as well as Iroquois, the first American-bred horse to win the Epsom Derby.