What can I say. Breathtaking. few lords and ladies can accomplish such a task.
Congratulation to the Emperors.
But what surprise me is that on your screenshot there is a tab showing, send reinforcement( only a league member can send reinforcement to a fort). show resource history. Something I believe only a league member can do.
There is also sapphires. 0.4K.... these can only mean 2 things
1. the screenshot was taken then send to plarium. since Oberon can't possible have such a screenshot
2. Oberon got the screenshot
2 will imply that
a. plarium have access to all players army
b. since Oberon account can be taken over by any administrator. then such admin can share the info with anyone.
In between there is no way that the screenshot was generated from scratch, that is just a cool Photoshop.