From WoWWiki

The Mark of Thrallmar is a Horde PvP token earned for world PvP in Hellfire Peninsula and Zangarmarsh, akin to Alterac Valley Mark of Honor.

Source

You can earn marks in two ways:

• The repeatable PvP quest Hellfire Fortifications (Horde) awards three marks for capturing forts in Hellfire Peninsula. Note that as of Patch 2.1.0, this quest can only be done once per 24 hours, but now rewards 150 Thrallmar reputation in addition to the three Marks.
• Delivering a killing blow to players of the opposing faction in the vicinity of Outdoor PVP objectives in either Hellfire Peninsula or Zangarmarsh awards one mark to each member of the killer's group or raid.

Rewards

Marks can be turned in to Battlecryer Blackeye in Thrallmar or the Horde Field Scout in Zabra'jin for a variety of rewards.

Battlecryer Blackeye offers:

Rings 15
Band of the Victor Binds when picked up Finger +25 Stamina Red Socket Socket Bonus: +4 Attack Power Requires Level 60 Equip: Improves critical strike rating by 13.	Circlet of the Victor Binds when picked up Unique Finger +25 Stamina Red Socket Socket Bonus: +2 Damage and Healing Spells Requires Level 60 Equip: Improves spell critical strike rating by 13.

Gems 10
Barbed Deep Peridot Binds when picked up Unique-Equipped +3 Stamina, +4 Critical Strike Rating "Matches a Yellow or Blue Socket."	Mighty Blood Garnet Binds when picked up Unique-Equipped +14 Attack Power "Matches a Red Socket."	Notched Deep Peridot Binds when picked up Unique-Equipped +3 Stamina, +4 Spell Critical Strike Rating "Matches a Yellow or Blue Socket."	Stark Blood Garnet Binds when picked up Unique-Equipped +8 Spell Damage "Matches a Red Socket."

Consumables 5
Thrallmar Favor Binds when picked up Requires Level 1 Use: In Hellfire Peninsula and Hellfire Citadel, increases Thrallmar reputation gained from killing monsters by 25% and experience gained by 5%. 30 minute duration. 1 Charges

The Horde Field Scout offers:

Trinkets 30
Mark of Conquest Binds when picked up Unique Trinket Classes: Warrior, Hunter, Rogue, Druid Requires Level 62 Equip: Increases attack power by 54. Equip: Sometimes heals bearer of 90 to 120 damage when damaging an enemy in melee and chance on ranged hit to restore 128 to 172 mana to the bearer.	Mark of Defiance Binds when picked up Unique Trinket Classes: Priest, Mage, Warlock Requires Level 62 Equip: Increases damage and healing done by magical spells and effects by up to 32. Chance on hit: Chance on spell hit to restore 128 to 172 mana to the bearer.	Mark of Vindication Binds when picked up Unique Trinket Classes: Paladin, Shaman Requires Level 62 Equip: Increases attack power by 54. Equip: Chance on spell hit to restore 128 to 172 mana to the bearer.

Class Specific Gear 15
Idol of Savagery Binds when picked up Idol Relic Requires Level 62 Equip: Increases the damage of your Claw and Rake abilities by 30.	Totem of Impact Binds when picked up Totem Relic Requires Level 62 Equip: Increases damage done by Earth Shock, Flame Shock, and Frost Shock by up to 46.	Libram of Zeal Binds when picked up Libram Relic Requires Level 62 Equip: Increases the melee attack power bonus of your Seal of the Crusader by 68 and the Holy damage increase of your Judgement of the Crusader by 47.
Splintermark Binds when picked up Bow Ranged Speed 2.50 93 - 174 Damage (53.4 damage per second) +7 Stamina Durability 75 / 75 Requires Level 62 Equip: Improves critical strike rating by 12. Equip: Increases attack power by 16.	Incendic Rod Binds when picked up Wand Ranged Speed 1.90 129 - 240 Fire Damage (97.1 damage per second) +8 Stamina Durability 65 / 65 Requires Level 62 Equip: Increases damage and healing done by magical spells and effects by up to 14. Equip: Restores 3 mana per 5 sec.	Terminal Edge Binds when picked up Thrown Thrown Speed 1.60 63 - 96 Damage (49.7 damage per second) +7 Stamina Durability 240 / 240 Requires Level 62 Equip: Improves critical strike rating by 12. Equip: Increases attack power by 16. 1 Charges

External links