I need help!

[Compass Rose]

I am not anywhere close to being an expert in that series. Without you highlighting the hex so it shows unit images, I am willing to bet that the image is some type of rocket which you would be able to fire through the Artillery Dialog Screen, as long as enemy units are within sight and range.

I would suggest you wait to get some feedback from some of the other members who know the game series better than I do, to be sure.