B.C. 50--A.D. 50.
The treacherous death of Naisi and his brothers Ardan and Alny, and her own bereavement and misery, were not the end of the doom pronounced at her birth for Deirdré, but rather the beginning. Yet the burden of the evils that followed fell on Concobar and his lands and his warriors.
For Fergus, son of Roeg, former king over Emain, who had stayed behind his charges feasting and banqueting, came presently to Emain, fearing nothing and thinking no evil, but still warm with the reconciliation that he had accomplished; and, coming to Emain of Maca, found the sons of Usnac dead, with the sods still soft on their graves, and his own son also dead, Deirdré in the hands of Concobar, and the plighted word of Fergus and his generous pledge of safety most traitorously and basely broken; broken by Concobar, whom he himself had guarded and set upon the throne.
Fergus changed from gladness to fierce wrath, and his countenance was altered with anger, as he uttered his bitter indignation against Concobar to the warriors and heroes of Emain and the men of Ulad. The warriors were parted in two by his words, swaying to the right and to the left, as tall wheat sways before one who passes through it. For some of them sided with Fergus, saying that he had done great wrong to put Concobar on the throne, and that even now he should cast him down again, for the baseness and treachery of his deed; but others took Concobar's part, saying that the first betraying was Naisi's, who stole away Deirdré,--the hostage, as it were, of evil doom, so that he drew the doom upon himself. They further said that Concobar was chief and ruler among them, the strong and masterful leader, able to uphold their cause amongst men. So indeed it befell, for the sedition of Fergus and his fight to avenge his wrong upon Concobar failed, so that he fled defeated to Meave, Queen of Connacht, at her stronghold amid the lakes whence issues forth the Shannon.
Meave, whose power and genius overtopped her lord Ailill, received the exiled king gladly, and put many honors upon him, holding him as the pillar of her army, with the two thousand men of the Ulaid who came with him;--those who had fought for him against the party of Concobar. At Cruacan, on the hillside, with the lakes of the Great River all around them, with the sun setting red behind the Curlew hills, with green meadows and beech-woods to gladden them, Meave and Ailill kept their court, and thence they sent many forays against Emain of Maca and Concobar, with Fergus the fallen king ever raging in the van, and, for the wrong that was done him, working measureless wrong on his own kingdom and the kingdom of his fathers.
After many a foray had gone forth against Ulad, crossing the level plains, it befell that Meave and Ailill her lord disputed between them as to which had the greatest wealth; nor would either yield until their most precious possessions had been brought and matched the one against the other. Their jewels of gold, wonderfully wrought, and set with emeralds and beryls and red carbuncles, were brought forth, their crescents for the brow, with hammered tracery upon them, their necklets and torques, like twisted ribbons of gold, their bracelets and arm-rings set with gold, their gems of silver and all their adornments, cloaks of scarlet and blue and purple, were all brought, and no advantage in the one was found over the other. Their battle-steeds also were brought, their horses for chariots; and likewise their herds of lowing wealth, their sheep with soft fleeces. When the cattle were driven up before them, it was found that among the herds of Ailill was one bull, matchless, with white horns shining and polished; and equal to this bull was none among the herds of the queen. She would not admit her lord's advantage, but sent forthwith to seek where another bull like the bull of Ailill might be found, and tidings were brought to her of the brown bull of Cuailgne,--of Cuailgne named after a chief of the Sons of Milid, fallen ages ago in the pursuit of the De Danaans, when the De Danaans retreated before the Sons of Milid from the southern headland of Slieve Mish to the ford at green Tailten by the Boyne, and thence further northwards to where Cuailgne of the Sons of Milid was killed. At that same place had grown up a dwelling with a fortress, and there was the brown bull that Meave heard the report of. She sent, therefore, and her embassy bore orders to Dairé, the owner of the bull, asking that the bull might be sent to her for a year, and offering fifty heifers in payment. Dairé received her messengers well, and willingly consented to her request; but the messengers of Meave from feasting fell to drinking, from drinking to boasting; one of them declaring that it was a small thing that Dairé had granted the request, since they themselves would have compelled him, even unwillingly, and would have driven off the brown bull by force. The taunt stung Dairé, after his hospitality, and in wrath he sent them forth empty-handed, and so they came slighted to Meave.
The queen, conceiving her honor impeached, would by no means suffer the matter so to rest, but stirred up wrath and dissension, till the armies of Connacht with their allies set forth to sack and burn in Ulad, and at all hazards to bring the brown bull. Fergus and the men who fought by his side went with them, and marching thus eastwards they came, after three days march through fair lands and fertile, to the river Dee--the frontier of Ulad, and the scene of many well-fought fights.
The army of Ulad was not yet ready to meet them, but one champion with his band confronted them at the ford. That champion was Cuculain, whose true name was Setanta, son of Sualtam, chief at Dundelga, and of Dectira the sister of Concobar. Cuculain was accounted the greatest and most skillful warrior of his time, and bards for ages after told how he kept the ford. For by the laws of honor, amongst them, the host from Connacht could not pass the ford so long as Cuculain held the ford and offered single combat to the champions. They must take up his challenge one by one; and while he stood there challenging, the host could not pass.