Just drew this up really quickly to show you what I have been thinking. (again excuse the horrible drawing)

Alright here's the story, a group of Martian soldiers are going for a city powerplant, which provides a forcefield protecting the city from any substantial attacks from the Martian army.

The grey boxes are going to be more futuristic buildings that I was too lazy to show and the green ray going up will be a beam/particles that comes from the top of the plant to form the force field.


https://img96.imageshack.us/img96/930...roment2so6.png