Brotherhood of the Horse
Outcast members of Stormwind's cavalry, these former riders started anew in the unexplored lands along the eastern coast, establishing their home, new relationships, and trade routes.
Raising reputation
Quests 0
No quest in the shared quest caches rewards Brotherhood of the Horse reputation yet.
Quests whose reward, in the game's own quest cache (build 1.60.1.70374), includes Brotherhood of the Horse reputation. Amounts are the base the game's QuestFactionReward table gives, before racial bonuses. The list grows as players share their caches.
NPCs 0
No quest giver for these quests recorded yet.
The game does not say which faction an NPC belongs to, so this lists the NPCs that give or take the quests above, as Zephras Collector uploads recorded them (accepted and confirmed by a trusted account or two independent ones).
From the WoW Forever game files, build 1.60.1.70374.