The Alvarez Empire is the 439th chapter of Hiro Mashima's Fairy Tail. Erza is taken to Lumen Histoire beneath Fairy Tail's ruins with Mest, only to be followed by the other members of Team Natsu, and a few others. Mest then transfers his memories to all of them, revealing his past, going from Makarov's request for him to infiltrate the Magic Council for information about the western continent to the revelation about the future invasion of it by the Alvarez Empire, which Makarov left for to protect his family.