This is a quick and easy event, the rewards are good and will help to boost tank research, and gives a free and good tier 6 premium tank.
This is a quick guide on the requirements and rewards of this event. You can view WG’s official article here.

Requirements
- Earn 2 “Pins” for every victorious battle on tanks with a x2-x5 XP bonus activated.
53 of these victories are needed to get the Bretagne Panther.
63 Of these victories are needed to finish the event completely.
- Earn “Mastery emblems” for earning mastery badges (classes 3, 2, 1 & Ace).
These can be used to open “Progresston Containers”
Rewards

Bretagne Panther is one of the main rewards.
-Temporary, non-combinable certificates for 50% off tank research for tier 6, 7, 8, 9, and 10 tanks.
-10 x3 XP certificates
-10 gold boosters
-10 combat XP boosters
-10 free XP boosters
Progresston container contains:
-XP boosters
-x3 XP certificates
-Gold boosters
-“Robocompanion” attachment
-“Xeno” Legendary camouflages for Škoda P-JS, VZ-44-1, TNH 105/1000, TNH T Vz.51, Vz. 55.
-“Roamer” Legendary camouflage for IS-3
-“Arronax” Legendary camouflage for KV-2
