[2020] Sub

Details on the submarine event: https://worldofwarships.com/en/news/general-news/submarine-battles/

If you go to the armory, there's a dedicated tab there where you can get random bundles. You can get 1 token a day when you log in to the game. If you're unlucky enough you still can get rental subs in 7 days. Event ends on June 24th.