Fianna
Fianna (singular fian) were small, semi-independent warrior bands in Irish mythology and Scottish mythology. They are featured in the stories of the Fenian Cycle, where they are led by Fionn mac Cumhaill. They are based on historical bands of landless young men in early medieval Ireland known as kerns.
The historical institution of the fian is known from references in early medieval Irish law tracts. A fian was made up of landless young men and women, often young aristocrats who had not yet come into their inheritance of land. A member of a fian was called a fénnid; the leader of a fian was a rígfénnid (literally "king-fénnid).
Geoffrey Keating, in his 17th-century History of Ireland, says that during the winter the fianna were quartered and fed by the nobility, during which time they would keep order on their behalf, but during the summer, from Beltaine to Samhain, they were obliged to live by hunting for food and for pelts to sell. Keating's History is more a compilation of traditions than a reliable history, but in this case scholars point to references in early Irish poetry and the existence of a closed hunting season for deer and wild boar between Samhain and Beltaine in medieval Scotland as corroboration.
Legendary depiction Some legendary depictions of fianna seem to conform to historical reality: for example, in the Ulster Cycle the druid Cathbad leads a fian of twenty-seven men which fights against other fianna and kills the twelve foster-fathers of the Ulster princess Ness. Ness, in response, leads her own fian of twenty-seven in pursuit of Cathbad.
However, the stories of the Fiannaíocht, set around the time of Cormac mac Airt, depict the fianna as a single standing army in the service of the High King, although it contains two rival factions, the Clann Baíscne of Leinster, led by Fionn mac Cumhaill, and the Clann Morna of Connacht, led by Goll mac Morna, and lives apart from society, surviving by hunting.
War cry and mottos The Diord Fionn was the war-cry of the Fianna, and they frequently employed its use prior to and amid battle, either as a mode of communication or to put fear into their enemies. In the legend "The Death of Fionn", Fionn raises the Diord Fionn when he sees his grandson Oscar fall in battle (Battle of Gabhra) against the armies of Cairbre Lifechair, and proceeds to strike back at the enemy with great furiosity killing many dozens of warriors.The Battle of Gabhra also marked the demise of the Fianna.
They had three mottoes:
Glaine ár gcroí (Purity of our hearts) Neart ár ngéag (Strength of our limbs) Beart de réir ár mbriathar (Action to match our speech)