TheWoWDBSo, technically there isn't a lead in to this quest, but since this is a heavily phased zone you have to do quite a bit before this guy will appear. And he actually gives you the quest in Andorhal, not The Writhing Haunt.
Start in Chillwind Camp and do all the quests you can there. Go to Andorhal and do all the quests you can there. You will be sent back to Chillwind Camp. Keep questing until you get one to go to The Writhing Haunt. Go there and do the quests. Next, go to Mender's Stead and pick up The Battle Resumes from the dwarf there (You can skip the rest of the Mender's Stead quests). This will take you back to Andorhal. Do a few more quests and Thurman Grant will finally appear with this quest. It's quite a bit more work than it seems like on this page, but you can get there.
Quest
Brother Against Brother
A World of Warcraft quest in Western Plaguelands. Facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
You get several farmers/militia to help you. They come complete with a pet bar. Leave them on defensive and they'll attack whatever you attack. Otherwise, pick a target and hit Ctrl-1 to get them to attack.
The target mobs are in packs of four. Easiest way to take them down is to focus fire: pick one, send you "pets" in and attack it yourself. They'll go down pretty quickly this way, but watch your health; the other three will be doing decent damage at the same time. The militia didn't seem able to tank. When I sent them after one mob, the other three in the pack seemed to automatically aggro on me.
You'll likely be doing Val'kyr Incursion at the same time. Your militia can help with that one as well.
Good for farming silk cloth. The 4-mob groups respawn decently. Just don't finish the quest until you have your bags full!
Quest facts
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(27202))
Requirements
Read from the Blizzard quest API.
What to do
Bracer of Grievance, 
Minuteman Pike, Quelling Bracers, 21g, 5,150 XPDescription
Our militia has been nearly wiped out. Only I and these few farmers remain. Those winged creatures... they took the bodies of our men and... and turned them into walking, undead corpses! With every one of our men they took, they bolstered their own ranks. It pains me to admit it, but you will need to fight them too, along with the deathguards and val'kyr. As they did in life, they hunt in packs, so take some of my minutemen with you.
Where to go
Pins are the quest’s own POI points from the current retail client, projected onto the in-game zone map. The game marks one blob as the quest’s turn-in; the rest are objective areas. Points that fall outside a map’s window are dropped rather than guessed at.
Turn-inObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaObjective areaIn-game waypoint: /way #22 40.1 69.3
Coordinates
- Turn-inWestern Plaguelands 40.1, 69.3
/way #22 40.1 69.3 - Objective area (centre of the marked area)Western Plaguelands 43.3, 69.0
/way #22 43.3 69.0 - Objective areaWestern Plaguelands 39.8, 69.7
/way #22 39.8 69.7
Map coordinates of the pins above. An area the client draws as a shape is given by the centre of its points.
Nearby on the Western Plaguelands map
- Honor the Flame about 400 yards
- Keeping the Peace about 560 yards
- Sacred Ground about 560 yards
- Seeking Guidance about 560 yards
- Desecrate this Fire! about 600 yards
- The Light Reveals about 650 yards
- Finding the Scepter about 1,280 yards
Quests whose map markers the client places closest to this one on Western Plaguelands, nearest first. Distances are straight lines between the markers.
Getting there
Alliance flight points closest to the quest’s turn-in marker on Western Plaguelands:
- Andorhal, Western Plaguelands
- Chillwind Camp, Western Plaguelands
- The Menders' Stead, Western Plaguelands
From the turn-in, the objective areas lie:
- Objective area
Straight-line distances in yards between the quest’s own map markers (QuestPOI) and the client’s flight-point positions (TaxiNodes); flight paths and terrain are not modelled.
Community notes from Wowhead · 9 comments
Top 3 shown aboveThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
The top 3 are shown in Top Comments above. Read all 9 on Wowhead.
Choose one of these rewards:
Other quests on the Western Plaguelands map
3D Model
First-party render from the game files. Model © Blizzard Entertainment.
Reward details
Pick one of these
Reputation: Stormwind +350
One of the last bastions of human power, this Alliance capital is ruled by the young but wise king, Anduin Wrynn.
Reputation group: Alliance.
Other quests in Western Plaguelands that reward Stormwind reputation: The Battle for Andorhal (+25), Scourge First... Horde Later (+250), War Machines (+350), The Endless Flow (+250), Scholomancer (+500), Brute Strength (+500).
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.
Storyline
Western Plaguelands
Part 21 of 63.
Previous: Val'kyr Incursion · Next: Aradne
- 16The Battle Resumes!
- 17Supporting the Troops
- 18Ashes to Ashes
- 19The Depravity of the Forsaken
- 20Val'kyr Incursion
- 21Brother Against Brother
- 22Aradne
- 23Alas, Andorhal
- 24Scourge First... Alliance Later
- 25War Machines
- 26The Endless Flow
- 27Scholomancer
Showing steps 16 to 27 of 63.
Storyline order is the client’s own QuestLine data from the current retail build.
Where this quest fits
Before this quest
Taken from the storyline's own step order.
- Val'kyr Incursion
The val'kyr were one of the Scourge's primary weapons. Not only were they skilled in battle, but they could be used to convert corpses into Scourge minions. To think that Sylvanas is stooping to such levels for the sake of the Forsaken...
After this quest
Taken from the storyline's own step order.
- Aradne
Our last hope of victory lies in defeating the val'kyr. You've done well up until now... but you're only one man and there are literally dozens of them raining destruction on the battlefield. One enormous val'kyr sits atop the tower to our south... you can see her from here.
Other quests with this name
This one: Alliance only · Western Plaguelands · Level 15-30.
The storyline at a glance
Western Plaguelands has 63 steps, from Scourge First... Horde Later to Turning Yourself In.
Maps its steps are placed on (steps per map): Western Plaguelands (63).
Steps of this storyline count toward:
Other storylines on the Western Plaguelands map
- The Ashbringer
- Tirisfal Glades
- Scepter of Sargeras
Steps, storylines and map placement from the client’s QuestLine, prerequisite and QuestPOI data; neighbouring quest text is Blizzard’s own (quest API), shortened to its opening sentences.