Warlord's Earthshaker is the Level 60 PvP Epic Set. It contains 6 pieces. Has set bonuses at 2, 3, and 6 pieces.
Warlord's Mail Armor
Warlord's Mail Helm
Warlord's Mail Spaulders
General's Mail Boots
General's Mail Gauntlets

General's Mail Leggings

Set Bonuses
Wearing more pieces of this set will convey bonuses to your character.
2 pieces: +20 Stamina.
3 pieces: Improves your chance to get a critical strike with all Shock spells by 2%.
6 pieces: +40 Attack Power.