Here is the full list of all 39 Tank Battle: East Front achievements.
Destroy 1 Tiger-i Tank.
Destroy 5 Tiger-i Tanks.
Destroy 10 Tiger-i Tanks.
Destroy 1 Panzer-ivh Tank.
Destroy 5 Panzer-ivh Tanks.
Destroy 10 Panzer-ivh Tanks.
Destroy 1 Russian T34-43 Tank.
Destroy 5 Russian T34-43 Tanks.
Destroy 10 Russian T34-43 Tanks.
Destroy 1 Russian KV85 Tank.
Destroy 5 Russian KV85 Tanks.
Destroy 10 Russian KV85 Tanks.
Destroy 3 enemy units in a row without losing any of your own.
Destroy 8 enemy units in a row without losing any of your own.
Destroy 12 enemy units in a row without losing any of your own.
Complete 5 scenarios on Hard difficulty.
Complete 10 scenarios on Hard difficulty.
Complete 15 scenarios on Hard difficulty.
Complete 30 scenarios on Hard difficulty.
Complete 50 scenarios on Hard difficulty.
Complete 80 scenarios on Hard difficulty.
Complete the tutorial.
Complete the Pheonix Campaign.
Complete the Panzers East Campaign.
Complete the Blitzkrieg Campaign.
Complete the Desperate Defence Campaign.
Complete the Attack! Campaign.
Complete the Onwards Campaign.
Complete the At All Costs Campaign.
Complete the Momentum Campaign.
Complete the Last Throw Campaign.
Complete the Evolution Campaign.
Complete the Push Back Campaign.
Complete the Collapse Campaign.
Complete the Onslaught Campaign.
Complete the Red Anvil Campaign.
Complete the Victory Campaign.
Complete the Downfall Campaign.
Complete the Last Stand Campaign.