You “master” a tank when you earn more Base XP in a single battle than the highest average Base XP earned in a single battle by 99% of players of that same tank within the past seven days.
Simply put, just try and beat the average.
This earns you 6x
Tank Mastery emblems!
If you attain mastery in one of the tanks below while the Tank Mastery mission is active, you also get a +100% (2 hours) 
Free XP Personal Reserve!
- Emil I Mastery
- Object 268 Mastery
- Sherman III Mastery
- WZ-132A Mastery
Rewards:
- 1x Personal Reserves: +100%
Free XP (2 hours) - 6x
Tank Mastery emblems (restricted to tank)
Free XP (2 hours)Conditions: Get the “Ace Tanker” Mastery Badge in a
VIII
Emil I
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
X
Object 268
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
V
Sherman III
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IX
WZ-132A
Restrictions:
- Grand and Random Battles Only
- Once Per Account
- AMX 13 90 Mastery
- AMX 50 B Mastery
- Bat.-Châtillon 25 t Mastery
- Marder 38T Mastery
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IX
AMX 13 90
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
X
AMX 50 B
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IX
Bat.-Châtillon 25 t AP
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IV
Marder 38T
Restrictions:
- Grand and Random Battles Only
- Once Per Account
- Ferdinand Mastery
- Pz.Kpfw. 38 (t) n.A. Mastery
- STB-1 Mastery
- Tiger I Mastery
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
VIII
Ferdinand
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IV
Pz.Kpfw. 38 (t) n.A.
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
X
STB-1
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
VII
Tiger I
Restrictions:
- Grand and Random Battles Only
- Once Per Account
- M5 Stuart Mastery
- O-Ni Mastery
- ST vz. 39 Mastery
- Strv 103-0 Mastery
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IV
M5 Stuart
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
VII
O-Ni
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IV
ST vz. 39
Restrictions:
- Grand and Random Battles Only
- Once Per Account
Rewards:
- 1x Personal Reserves: +100%Free XP (2 hours)
- 6xTank Mastery emblems (restricted to tank)
Conditions: Get the “Ace Tanker” Mastery Badge in a
IX
Strv 103-0
Restrictions:
- Grand and Random Battles Only
- Once Per Account
