Damn thats beast, kinda funny I was looking through atlas loot counting up all the tabards you could get too see if you could get the achiev and then I come on here and see you got it.
When i did a alliance to horde on my lock about 1 and half year ago, my stormpike/frostwolf & siverwing/warsong tabard changed i did not get to get both. is this a new thing or was i just unlucky. or is the achev that carrys like they ppl who do ambasador title that way. grats on the tabard thats awesome