The Elder Scrolls IV: Oblivion/Allies for Bruma

To Activate this Quest, you must complete the quest Bruma Gate from the main story. After speaking with Jauffre, who asks you to gather support from all the other cities of Cyrodill, and so the quest begins.

Anvil
Go to Castle Anvil, speak with Countess Millona Umbranox. Ask for Aid for Bruma, she is willing to help, but not with an Oblivion Gate just outside the city walls. If you have closed the gate already she will lend support.

The Oblivion Gate
Just northwest of Anvil is the Oblivion Gate. Once in the Wastes of Oblivion follow the path southwest. Continue along it southeast, and when it you reach the fork in the road, take the southwest path. Never mind the two towers, keep your eyes on the west wall from this point on. There is a doorway kind of camouflaged into the wall called Nether Tunnels, head on in.

Take either tunnel to be on your way, it doesn't matter which, and head southwest. The door, Oblivion Cave, shouldn't be to hard to find. Inside, follow the north path and head down the northeast tunnel after that, head down this route and enter the Oblivion Cave. This leads back out to the Wastes of Oblivion.

Back outside take the northeast route. At the end of the path is a doorway to The Red Gnash Channels. Inside again, take the northwest trail and follow it until you see opening along the northeast wall. Go in and follow the path to its end, where a doorway leads back to Wastes of Oblivion.

Take either Rending Halls doorway and follow the path to a room. There is an opening along the north wall, enter and follow it until you reach The Flesh Spire doorway. Head up the ramp until coming to a door along the south wall leading to Dead Halls. Go up the path and until you find a small room. North will be a path which will bring you up, take the path, at the top is another room accompanied by a couple doors along the south wall which will bring you to The Flesh Spire.

Finally, follow this spire all the way up until you reach the final room, Sigillum Sanguis. Go up the spiked staircase on either side of this area and then up the red ramp. You are at the top of the tower now, head to the center and remove the Sigil Stone.

Head on back to Castle Anvil and speak with Countess Millona Umbranox, picking Aid for Bruma to complete this part of the quest.

Imperial City
At the Imperial City Palace, enter the Elder Council Chamber and find High Chancellor Ocato. Ask him for Aid for Bruma. He will deny you troops, completing this part of the quest.

Kvatch
Head to Kvatch and work your way through the ruined city to the Kvatch Castle Great Hall. Here you will find Salvian. Ask him about Aid for Bruma to complete this part of the quest.