ORIGINAL: JAMiAM
What happened was that the attack against the adjacent hexes caused the artillery to support the defenders. This is what revealed the previously unrevealed stack. That looks like the stock Barbarossa 41 scenario, and the recon values are set at 0, so you are generally not going to see further than the hexes adjacent to your own units. At least as player one.
There you go. It does remind me, though, of what
is a flaw.
Ships automatically provide fire support -- and reveal their position when they do. I have literally had exactly this situation in
Seelowe:
The British have slipped some destroyers into the Thames Estuary -- where they will be in a position to pounce on traffic in the Channel next turn. I can't see them when my turn comes, but I saw them go in. However, the blocking unit representing the British coastal defences prevents me going in with a ship to spot them.
Solution? Launch an otherwise pointless attack along the front along the south coast of the Estuary. The British destroyers automatically fire in support -- there they are! Now I can cream them with my Stukas.
Not very realistic. Ships -- like artillery -- should have the ability to refrain from firing in support.