Against the Odds

The Tenacity buff is given to the faction with the fewest members in the Wintergrasp zone during a PvP battle for control of the Titan Relic.

This achievement was earned by winning the battle while being (sufficiently) outnumbered.

It is known that the Tenacity buff is only applied to characters level 70 or above, so level 70 is a minimum for gaining this achievement.

Note

 * Contrary to the patch notes, this achievement was not converted to a feat of strength, and was simply removed.