Thanks to Babykim, EU
The event on the Russian premium battleship Oktyabrskaya Revolyutsiya will take place 17-31 July, on EU probably one day later.
Task 1: 50 wins + 300k damage to battleships
Task 2: 30k pure XP + 300k damage to destroyers
Task 3: 50 citadels + 300k damage to cruisers
Task 4: 100 planes + 3k ribbons
Awards for the individual tasks are unknown.
You can do all tasks in parallel, starting from tier IV in coop or randoms.
The ship will be sold after the event.