This pack includes:
3 days of premium account;
5 Universal backups (Rank I-VII);
+15% Silver Lions (10 battles);
+15% Research Points (10 battles).
With a Premium account (also purchasable in the game for Golden Eagles) you will earn more Research Points and Silver Lions during each battle for a set amount of days. This is cumulative with bonuses from premium vehicles!
War Thunder - Free "Wind of Change" Pack is a DLC that works on these games