The Siege of Ettenmoors is a Battle Between the combined armies of Angmar & Goblins Vs. the Elves of Rivendell & Lorien. The battle began in the time of The Fall of Arnor in January TA 1300.
The Goblins & Angmar set up camp in the snowy Ettenmoors. Elrond found out that more Goblins were setting up camp in the Ettenmoors. He sent Rivendell's two heroes, Glorfindel, Glóin, Idrial & an army of Elves from Lothlórien & Rivendell to destroy Angmar at the Ettenmoors. Angmar founded that an army of Elves are going to attack the armies of Angmar & Goblins. After the camp was ready, a huge army of Goblins & Angmar are trained to battle with Forged Blades, Heavy armour & Banner carriers. Soon the Elves will come to attack in two hours so the Goblins made the Ettenmoors Fortress (see left) stronger so it wouldn't be destroyed by the Elves. Then two hours has passed but before the battle can begin, five Rivendell Lancers came to the Ettenmoors gate. Trying to destroy the gate, Gorkil killed two of the Rivendell Lancers & so the Rivendell lancers joined in the army of Elves. The Elves charged & the combined evil armies charged at the Elves. More Elves are begining to get killed more because of the combined armies of Angmar & Goblins. Some Dwarves & Elves fleed back to Rivendell. Glorfindel & Glóin fleed with the others back to Rivendell But as the battled continued on, Idrial the archer came to fight Gorkil. As the Witch-King of Angmar helped out Gorkil killing her, Gorkil quickly picked up a Lorien archer's bow & shoot her in the right shoulder. Then quickly Gorkil sliced off Idrial's left arm & the Witch-King of Angmar wield his Morgul Blade & stabbed Idrial, falling dead in the snow. When Idrial was killed, Gorkil & the Witch-King continued on killing the rest of the elves of Lothlórien. After all of the Elves were killed, Gorkil now has a bow to kill his enemies & all of the combined forces of Angmar & Goblins won the battle as they moved on to destroying Arnor forever