More Tier 4 changes coming to help resolve stability issues in these higher level areas:

The epic battle between the forces of Order and Destruction rages on across the lands. Dark Elf against High Elf, Dwarfs pitted against their age old enemy the Greenskins, and the upstart Humans of Order wage a bitter battle against the Forces of Chaos.

Sometimes epic warfare is halted by the powerful forces of server instability. The Mythic team is fighting a WAR of our own against these Fortress Siege stability issues and is now prepared to take the next step towards the long-term goal of providing our players with a truly epic Tier 4 Campaign. We will be implementing more improvements in the coming weeks however this initial change will allow more players to experience the Tier 4 campaign to its fullest.

Players on the Phoenix Throne, Dark Crag, Vortex, and Darklands servers (with a planned deployment to all live servers to follow in the coming days) will immediately notice a change to the way that the Tier 4 Racial Pairing Fortress sieges function. We will be implementing a hard cap on the total number of players that are able to occupy the Fortress area during a siege. The purpose of this change is twofold: to improve server stability, and allow even more players to participate in, and benefit from, capital city sieges.

When the Fortress population reaches certain population thresholds, players who are attempting to enter the area of the besieged Fortress that are Rank 35 and below will be teleported to the warcamp for the region they are in. When the next area population threshold has been met, players that are Rank 37 and below will be teleported to the warcamp. The final population threshold applies to players that are Rank 39 and below. Once the total population cap has been met for the area surrounding the Fortress, all players that attempt to enter the area will be teleported back to the region’s warcamp.

It’s very important to note that the majority our players’ Fortress siege experience should not be noticeably affected by this change. Hundreds of players will still be able to participate in taking the Fortress from their enemies. This measure will help to ensure that players are able to experience these epic battles in a more reliable manner.
 
Because of the strategic advantage that players will always have when defending a Keep, the attacking forces will have a numeric advantage when attempting to wrest control of a Keep from the opposing realm.

So get out there, lay waste to your enemies, drive their forces before you on the field of battle and be sure to choose your allies wisely.