Board Game Arena

My context is my convoy and an inf army are at the tip of Denmark as Germany. I declared on norway I want to naval invade Oslo.

How do I accomplish this within the UI?

I was able to accomplish moving my convoy and the INF army from Kiel to the top of Denmark but naval invasion options never seemed to become available. Is it possible to explain the actions I have to take in the User Interface please?

I searched the forums, apologizes in advance if I am missing something obvious.

Do as stated in rules:
- Put a SURPRISE ATTACK marker in a sea zone (take care about weather).
- Activate your ground unit and click on Naval TRANSPORT.
- Declare ESCORT and click on INVASION.
- Finally, click on target hex in Norway.

All of that can be undo, so try it.

So does this mean that you can only make an amphibious invasion if you use a SURPRISE ATTACK marker?

There is no other way you can land an army on an island unless you control a port there otherwise?

Correct

Thanks!