Everything besides the flag and the sign which you can't see, saying Happy Birthday is all edible. I used Hershey's Chocolate bars and Oreo Cookies to make the tracks. The cannon is a dipped chocolate pretzel.
This is just the other view of it. Making black frosting is very challenging but it sure made the camouflage look correct. Again - I stick with my typical buttercream frosting for decorating. I think I thinned it out a bit to make it easier to spread across the cake. If I remember correctly, I think I made a 9 x 13 cake and used a bread pan to make more cake. Then I cut the cake to the right shape.