World of Tanks Update 9.18 will be released first for the North America region, and only later to other regions. According to WOT Express, it’s because it’s a major update with a big impact in the game, and Wargaming doesn’t want to hit the bigger Russian and European Servers before they can make sure everything is working correctly.
These are the dates announced for the release of Update 9.18:
- NA Region: 18 April 2017
- Other Regions: 26/27 April 2017
Source: WOT Express