Help needed trying to remember an old amiga game

Hi,

I wonder if anyone can help me. I am trying to find the name of a game
I had on my amiga years ago. Details are very sketchy so please
forgive the randomness of this but things I remember were.

It was a simulator type affair where you could fly a plane, helecopter
(I think!) and tank, possibly other craft

The action took place in a big landscape, I think it was a desert but
with different mountain range areas possibly with greenery

It was set in the future.

That is about it as I recall, any help would be great.

Thanks.