UPDATE: Missions are now on EU too.
On the occasion of the World of Tanks nomination for the Golden Joystick 2018 award in the Still Playing category, Wargaming has prepared a special set of missions for the Russian server. No idea if they will arrive to any other servers.
The missions are to appear in the game every two days from 10 to 26 October.
http://rykoszet.info/wp-content/uploads/2018/10/1920×900-gj-1024×480.jpg
Missions
Important achievements # 1
Awards
x 50,000
6x Special emblem
Objectives
- Play 3 battles.
limitations
- Only random battles
- Available once per account.
- Only vehicles of IV-X tiers.
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Important achievements # 2
Awards
15,000 xp
5x Large repair kit
Objectives
- Deal 3,000 damage in any number of battles.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 3
Awards
- x 50,000
- 6x Special emblem
Objectives
- Get 3000 xp in any number of battles.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 4
Awards
- 15,000 xp
- 5x Large repair kit
Objectives
- Win three battles.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 5
Awards
- x 50,000
- 6x Special emblem
Objectives
- Damage 3 enemy vehicles in any number of battles.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 6
Awards
- 15,000 xp
- 5x Large repair kit
Objectives
- Find yourself in the top ten players in the team in terms of acquired base experience 3 times.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 7
Awards
- x 50,000
- 6x Special emblem
Objectives
- Destroy 3 enemy vehicles in any number of battles.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.
___________________________________
Important achievements # 8
Awards
- 15,000 xp
- 5x Large repair kit
5x A large first aid kit 
5x Automatic fire extinguisher
Objectives
- Find yourself in the top ten players in the team in terms of damage done 3 times.
limitations
- Only random battles
- Once per account
- Only vehicles of IV-X tiers.