Sol Conflict —
A Universe from the Mind of Evestrial
This is a time when Mars, Venus, and several small moons in the belt and Jovian system have been colonized. The Jovian Colonies fought for independence against Earth and Mars and lost because they could not fight against the GeneMod soldiers employed by Earth or the larger, more complete, combined Navy of Earth and Mars. Now the belt colonies and several of the Jovian moons are little more than slave labor camps with only a couple exceptions.
A short story about a terrorist plot to collapse one of the environmental walls on Mars and the two men trying to stop it, a retired Navy Communication officer who is getting to old for this and his only real friend, a Marine GeneMod Soldier that was forcible retired after the colonial war ended.