The Steel Tide
The same problem :/
I’m having the same problem where I can’t use the tank at all. I try to move it or fire and it kicks me out.
Same here. And if you try to change the direction, it will never stop turning thus your cannon is always pointing at east or west, where there is no enemy.
Got it completed when I just sat way behind the tanks AFKing for a long time.
Just did it last night. Same problem as the OP. I used the artillery instead, and it only was semi-effective. In the end, I just kited stuff around for a LONG TIME and then the event magically completed. (Died about 4 times in the process, due to getting stunlocked. Grrr.)