http://www.pcgamer.com/black-desert-online-free-kamasylvia-expansion-release-date-set/

Last week, Black Desert Online developer Pearl Abyss revealed its fantasy MMO has sold over 530,000 copies on Steam and has 7.65 million registered players. That number is likely to increase in the near future, as the first part of the game's free Kamasylvia expansion is due to launch on September 27. 

In a lengthy list of patch notes also revealed last week, Pearl Abyss noted that four new servers boasting the server group name 'Kamasylvia' had been added, before saying: "You know what that means… Kamasylvia Part 1 coming real soon!"