Battlemaster

It will take long to get, but it's said that you will get a 'Battle Master' or 'Battlemaster' title for it.

To get it:

Av part:
- 100 AV wins
- 50 Graveyard captures (by you) in AV
- 50 Tower Defends (by you) in AV
- 50 Honorable Kills in Drek'Thars/Stormpikes room (only the room of your faction general)
- Win while your team is in control of both graveyards
- Win AV in 6 minutes
- Kill someone before he dismounts
- Win while your Captain and General survives, all towers (both the Horde and Alliance ones) are controlled by your faction (so not destroyed)
- Defend and assault a Tower and a Graveyard and kill soemone at the Field of Strife in 1 AV battle
- Own the AV epic mount (of your faction ofc.)
- Loot http://wotlk.wowhead.com/?achievement=1166

Ab part:
- 100 AB wins
- Win AB with a 2000 to 0 score
- Take 50 flags in AB
- Assault 3 bases in 1 AB battle
- Defend 3 bases in 1 AB battle
- Defend (by recapping the flag) 50 AB bases
- Overcome a 500 point disadvantage in AB and win (so wen your team has 500 points and your enemy got 1000 you need to win (while you where losing first)
- 10 Victories with all 5 bases under your control
- Win AB in 6 minutes
- In 1 AB battle interupt flag capture 'x' times
- A second achievement with 'x' flag interupts
- Win with 2000 vs 1990 points
- Assault and Defend 2 bases (so 4 in total) in 1 battle
- Get 5 honor kills at all the 5 bases (25 kills in total) in 1 battle

WSG part:
- Get 100 WSG wins
- Capture the flag
- Return the flag 50 times
- Return the flag 5 times in 1 battle
- Win WSG with 3-0
- Win WSG in (less then) 7 minutes
- Score 3 flag captures in 1 battle, without dying
- Get exalted with your WSG faction
- Kill 'x' players before they leave your flag room
- Grab the flag and capture it within 75 seconds
- Kill 'x' flag carriers
- Kill the flag carrier while he's in their flag room (just before scoring)

EotS part:
- 100 EotS wins
- Win with 2000 vs 0 points
- Win 10 battles while holding 4 bases
- Win within 6 minutes
- Get 5 honorable kills on 5 flag carriers
- Capture the flag
- Capture (in 1 battle) 3 flags (and score) without dying
- Get a killing blow under effect of the Berserker buff in EoTS
- Kill the flag carrier, pick up the flag and score for your team
- Kill an enemy who is standing on the starting rock

The Arena Part:
- Win a ranked match in Blade's Edge, Nagrand and Lordearon arena
- Win 300 (ranked) matches
- Get a 2200 rating in 2vs2
- Get a 2200 rating in 3vs3
- Get a 2200 rating in 5vs5
- Win 10 matches in a row (without losing)
- Win 10 matches in a row (without losing) with an rating of 1800 or above
- Win 10 matches in a row (without losing) with an rating of 2000 or above
- Be the only survivor (of both teams ofc.) in a (ranked) 5vs5 match
- Kill someone within 15 seconds of the start of the match
- Win a match within 45 seconds

Good Luck Battlemasters!

This achievement is designed for the absolute best. They will not allow for any compromises, as someone wondered at above. Almost nobody will earn this. The title of Grand Marshal / High Warlord will be nothing compared to this. Anyone who earns this will, simply put, be a PvP God.

Arena part is seperate and gives the Arena Master title, so you don't have to worry about winning 10 games straight at 2200+.