This ancient kingdom of Pandaria has been untouched since the times the world had been destroyed ten thousand years ago. The dense forests and the mountains shrouded in fogs serve a home for a vast number of endemic races and exotic beings. That's the home of the enigmatic pandaren — an elusive race that enjoys the life even being under the threat.
The great empress of the mantid has been corrupted by Sha of Fear. The empress gave irregular and even paranoid orders. For this reason the Klaxxi — those who keep the culture of mantids — had to act aggressively. As Klaxxi aren't numerous, they are ready to accept the help from the outside unwillingly. But that will help them to defeat the empress and eliminate the malevolent influence of sha.
The mogu which were proud of their superiority had a huge complex of vault where they had put long-listed records of their achievements. How it's all constructed inside of the huge chambers was hidden under the mystery. Moreover, the creation of the chambers even predated the written records of pandaren. According to the rumors, there was a powerful army that had been put inside. That's why the old pandaren rebellion has chosen the vaults (which have been sealed since the times of the mogu empire’s loss) as the primary target.