Big Mamie campaign breakdown

Intro

She's finally here! At long last, you can earn U.S. Tier VII Premium battleship Massachusetts. The Big Mamie Campaign runs for 6 weeks, and you have 120 milestones to complete in order to unlock her. She isn't the only ship included in this Campaign either! At milestone 40, you can also earn Yahagi, a Japanese Tier IV Premium light cruiser. This time, there are three biweekly Havocs to complete—you have 2 weeks to complete each one. There are no catch-up mechanics, so don't miss a fortnight! 

The TL;DR is: Massachusetts & Yahagi, three Havocs in 6 weeks (2 weeks for each Havoc), no catch-up.

Massachusetts is a highly anticipated ship, plus there's Yahagi in the mix, so don't expect this Campaign to be easy!

Let's take a look:

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Weekly Havoc Missions

Weeks 1 & 2

Available from December 21 until January 4.

Endurance Trials

Must be completed in Standard battles or battles Versus AI. Tier III–VII ships.

1. Stage: Win 3 battles (75 Renown)
2. Stage: Earn 21,000 XP (75 Renown)
3. Stage: Earn 2,100,000 credits (75 Renown)
4. Stage: Earn 2,100 Global XP (100 Renown)
5. Stage: Earn 21,000 Commander XP (100 Renown)

Shakedown Trials  (locked by Endurance Trials)

Must be completed in Standard battles. Tier IV–VII ships.  

1. Stage: Deal 1,000,000 damage to enemy ships (125 Renown) 
2. Stage: Deal 150,000 damage to enemy ships by setting them on fire (150 Renown) 
3. Stage: Deal 150,000 damage to enemy ships with torpedoes (150 Renown) 
4. Stage: Destroy 15 ships (150 Renown)

Finishing the Weekly Havoc (Weeks 1 & 2) will reward you with 1,000 Renown.

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Weeks 3 & 4

Available from January 4 until January 18.

Endurance Trials

Must be completed in Standard battles or battles Versus AI. Tier III–VII ships.

1. Stage: Win 3 battles (75 Renown)
2. Stage: Earn 21,000 XP (75 Renown)
3. Stage: Earn 2,100,000 credits (75 Renown)
4. Stage: Earn 2,100 Global XP (100 Renown)
5. Stage: Earn 21,000 Commander XP (100 Renown)

Shakedown Trials  (locked by Endurance Trials)

Must be completed in Standard battles. Tier IV–VII ships.  

1. Stage: Hit enemy ships 1,000 times with your main battery (150 Renown) 
2. Stage: Hit enemy ships with torpedoes 30 times (150 Renown) 
3. Stage: Receive 15,000,000 HP of potential damage (150 Renown) 
4. Stage: Destroy 15 ships (150 Renown)

Finishing the Weekly Havoc (Weeks 3 & 4) will reward you with 1,000 Renown.

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Weeks 5 & 6

Available from January 18 until February 1.

Endurance Trials

Must be completed in Standard battles or battles Versus AI. Tier III–VII ships.

1. Stage: Win 3 battles (75 Renown)
2. Stage: Earn 21,000 XP (75 Renown)
3. Stage: Earn 2,100,000 credits (75 Renown)
4. Stage: Earn 2,100 Global XP (100 Renown)
5. Stage: Earn 21,000 Commander XP (100 Renown)

Shakedown Trials (locked by Endurance Trials)

Must be completed in Standard battles. Tier IV–VII ships.  

1. Stage: Set enemy ships on fire 25 times (125 Renown) 
2. Stage: Hit enemy ships 1,000 times with your secondary battery (150 Renown) 
3. Stage: Hit citadels of enemy ships 21 times (150 Renown) 
4. Stage: Destroy 15 ships (150 Renown)

Finishing the Weekly Havoc (Weeks 5 & 6) will reward you with 1,000 Renown.

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Summary

To complete the Big Mamie Campaign and unlock U.S. Tier VII Premium battleship Massachusetts, you need to accumulate 2,975 Renown.

Completing all three Havoc missions will net you a total of 3,000 Renown. 

Good luck, Legends!