Launched on December 1st, Siege of Mirkwood is Lord of the Rings Online's third expansion. The expansion opened a new zone - Mirkwood - which contained a new raid, as well as a host of quests, instances, and content for all types of players. The expansion also added a new feature, skirmishes, which allow players to do small instanced encounters from anywhere in the world, earning special rewards and controlling their own soldier that joins them in combat.
The expansion also revamped several systems, from the Legendary Item system, to crafting, mounts, combat, statistics, and UI.