Unexpected achievement

[wot_2016_gunner]

So... today i logged in and i get this achievement.

I don't really know why i got it; it says that it's for having completed a mission from a stream, I assume it's for the one of the European containers as in fact i did completed one of those missions, but that was some time ago and this achievement is a bit... late. 

 

Am i right about it?

[Johnny_Moneto]

You are correct in every way.