Battle of the Five Armies
Event Type: Military/Strategic
Age: 3rd Age - The Stewards
Date: November 23, 2941
"So began a battle that none had expected; and it was called the Battle of Five Armies, and it was very terrible. Upon one side were the Goblins and the wild Wolves, and upon the other were Elves and Men and Dwarves. This is how it fell out. Ever since the fall of the Great Goblin of the Misty Mountains the hatred of their race for the dwarves had been rekindled to fury. Messengers had passed to and fro between all their cities, colonies and strongholds; for they resolved now to win the dominion of the North. Tidings they had gathered in secret ways; and in all the mountains there was a forging and an arming. Then they marched and gathered by hill and valley, going ever by tunnel or under dark, until around and beneath the great mountain Gundabad of the North, where was their capital, a vast host was assembled ready to sweep down in time of storm unawares upon the South. Then they learned of the death of Smaug, and joy was in their hearts: and they hastened night after night through the mountains, and came thus at last on a sudden from the North hard on the heels of Dain. Not even the ravens knew of their coming until they came out in the broken lands which divided the Lonely Mountain from the hills behind. How much Gandalf knew cannot be said, but it is plain that he had not expected this sudden assault.
… Their only hope was to lure the goblins into the valley between the arms of the Mountain; and themselves to man the great spurs that struck south and east. Yet this would be perilous, if the goblins were in sufficient numbers to overrun the Mountain itself, and so attack them also from behind and above; but there was no time for make any other plan, or to summon any help."
The Hobbit, Ch 17, The Clouds Burst
[A note on the date: the year is canon, but the day is an estimate by Fonstadt from her book: The Atlas of Middle-earth, Revised Edition, by Karen Wynn Fonstad, Section 5, The Hobbit: Introduction]
Lyllyn 8.30.03; added date & note: Elena Tiriel 7.17.04