WoW Battle Ground Warsong Gulch

Warsong Gulch

You can start coming here at level 10.

The supply officer is Illiyana Moonblaze.

At level 10 you can get the Silverwing Battle Tabard.  However, I can see nothing that the tabard helps you with.

Start at level 18 you can start buying trinkets, weapons, caps, necklaces  and rings.  This set of items repeats at levels 28, 38, and 48.

At level 20 you can get the rune.

At level 21 you can pickup the Report from the Northern Front quest.

At levels 25, 35 and 45 you can buy rations and bandages.  These can only be used in the battle ground.

At levels 25, 35 and 45 you can the the Sentinel Care Package quest.

At leve 35 and 45 you can buy healing and mana droughts.

The WOW Wiki site has some good stuff on strategy.