First Siege of the Black Gate

The First Siege of the Black Gate was the first of many sieges over the Black Gate. No-one knows why either side had such fascination with retaining control over the Black Gate, but it was always fought over with zeal and courage.

Prelude
After winning the previous Battle of Thranduil's Halls, the wrath-filled Elves marched south, following Sauron and Khamûl's broken forces all the way to Mordor itself. When Sauron and Khamûl turned to defend the Black Gate, they were sieged by a massive elven force.

Battle
The siege of the Black Gate itself took a long time, as after Khamûl's early defeat Sauron refused to back down from the walls. Slowly, his forces were picked off by Legolas, after which Elrohir and Elladan's livery rode East and West, managing to miraculously scale the Cliffside's and smash Sauron's flanks. Sauron quickly retreated afterwards, taken by surprise at the ferocity of the High Elven attack.

Aftermath
After the battle was finished, Legolas helped organize the Mallorn Council, a council of Elven leaders to jointly rule the Black Gate and help defend the Free Peoples from subjugation. The Mallorn Council also invited the Rohirrim to help man the Black Gate, which Reinwald and Beowulf gladly accepted. However Sauron's retreat, though seemingly out of fear, was in fact a calculated maneuver which allowed him to return in the Second Siege of the Black Gate, massacring many Elves and Rohirrim alike.