To start the celebration of the upcoming anniversary properly, Wargaming has updated World of Tanks to 1.9, a version that comes with quite a few noticeable changes: a completely reworked tech tree without some hardware that has been placed into a separate tab as Collectors' Vehicles, increased HP for the low tiers, and more.
https://www.notebookcheck.net/Happy-anniversary-World-of-Tanks-Wargaming-s-flagship-product-has-been-around-for-almost-a-decade.462226.0.html