Crossed Out Eye Icon Above Troops

[Pestilence]

Does it mean they are hidden or does it mean they don't have LoS to a visible target?

[Koro]

It means the enemy cannot see them

[danloveschrista]

I was wondering the same thing, seemed like it was visibility to enemies. Thanks for the info!

[Fate]

On your scouts it also indicates whatever or not artillery shells will be landing around them in the next 3 seconds.

[HolaGorgonzola]

They need to add an answer to this in tutorial.