The medieval myth of
Partholón says that his followers were the first to invade Ireland after the flood which occurred in Genesis, but the Fomorians were already there:
Geoffrey Keating reports a tradition that the Fomorians, led by
Cichol Gricenchos, had arrived two hundred years earlier and lived on fish and fowl until Partholon came (this detail only appears in the 3rd Redaction of the
Lebor Gabála Érenn), bringing the
plough and
oxen. Partholon defeated Cíocal in the
Battle of Mag Itha, but all his people later died of plague. Then came
Nemed and his followers. Ireland is said to have been empty for thirty years following the death of Partholon's people, but Nemed and his followers encountered the Fomorians when they arrived. At this point, Céitinn reports another tradition that the Fomorians were seafarers from the Middle East, descended from
Ham, son of Noah. Nemed defeated them in several battles, killing their kings Gann and Sengann, but two new Fomorian leaders arose:
Conand son of Faebar, who lived in Conand's Tower on
Tory Island,
County Donegal, and Morc son of Dela (note that the first generation of the
Fir Bolg were also said to be sons of Dela). After Nemed's death, Conand and Morc enslaved his people and demanded a heavy tribute: two thirds of their children, grain and cattle. Nemed's son
Fergus Lethderg gathered an army of sixty thousand, rose up against them and destroyed Conand's Tower, but Morc attacked them with a huge fleet, and there was great slaughter on both sides. The sea rose over them and drowned most of the survivors: only thirty of Nemed's people escaped in a single ship, scattering to the other parts of the world. The next invasion was by the
Fir Bolg, who did not encounter the Fomorians. Next, the Tuatha Dé Danann, who are usually supposed to have been the
gods of the Goidelic Irish, defeated the Fir Bolg in the first
Battle of Mag Tuired and took possession of Ireland. Because their king,
Nuada Airgetlám, had lost an arm in the battle and was no longer physically whole, their first king in Ireland was the half-Fomorian
Bres. He was the result of a union between
Ériu of the Tuatha Dé Danann and the Fomorian prince Elatha, who had come to her one night by sea on a silver boat. Both Elatha and Bres are described as very beautiful. However Bres turned out to be a bad king who forced the Tuatha Dé to work as slaves and pay tribute to the Fomorians. He lost authority when he was satirised for neglecting his kingly duties of hospitality. Nuada was restored to the kingship after his arm was replaced with a working one of silver, but the Tuatha Dé's oppression by the Fomorians continued. Bres fled to his father, Elatha, and asked for his help to restore him to the kingship. Elatha refused, on the grounds that he should not seek to gain by foul means what he couldn't keep by fair. Bres instead turned to
Balor, a more warlike Fomorian chief living on Tory Island, and raised an army. The Tuatha Dé Danann also prepared for war, under another half-Fomorian leader,
Lug. His father was
Cian of the Tuatha Dé, and his mother was Balor's daughter
Ethniu. This is presented as a dynastic marriage in early texts, but folklore preserves a more elaborate story, reminiscent of the story of
Perseus from
Greek mythology. Balor, who had been given a prophecy that he would be killed by his own grandson, locked Ethniu in a glass tower to keep her away from men. But when he stole Cian's magical cow, Cian got his revenge by gaining entry to the tower, with the help of a
druidess called
Biróg, and seducing her. She gave birth to triplets, which Balor ordered drowned. Two of the babies either died or turned into the first
seals, but Biróg saved one, Lug, and gave him to
Manannán and
Tailtiu to foster. As an adult, Lug gained entry to Nuada's court through his mastery of every art, and was given command over the army. The second Battle of Mag Tuired was fought between the Fomorians under Balor and the Tuatha Dé under Lug. When the two forces met on the field of battle, it was said that to attack the fierce Fomorian flank was like striking a head against a cliff, placing a hand into a serpent's nest, or facing up to fire. Balor killed Nuada with his terrible, poisonous eye that killed all it looked upon. Lug faced his grandfather, but as he was opening his eye Lug shot a
sling-stone that drove his eye out the back of his head, wreaking havoc on the Fomorian army behind. After Balor's death the Fomorians were defeated and driven into the sea. According to the Irish version of the
Historia Britonum of Nennius, the Fomorians are referred to as mariners who were forced into a tower near the sea by the
Tuatha Dé Danann. Then the Irish or otherwise descendants of
Nemed with
Fergus red-side at the lead, pushed all the Fomorians into the sea, with the exception of one ship that survived.
The Training of Cú Chulainn The Fomorians were still around at the time of
Cú Chulainn. In the medieval Irish tale entitled
The Training of Cú Chulainn, preserved as a copy by
Richard Tipper in British Library, Egerton MS 106, it gives the following mention: In later times, any settled pirates or seaborne raiders were labelled Fomorians and the original meaning of the word was forgotten. ==List of Fomorians==