Between planets of the Solar System, countless ships were in operation. The terrestrial planets offered minerals and rare earth elements, the gas giants provided nuclear fuel, and every Space City produced technical products—including various resources from the Asteroid Belt such as water...
And of course, there were soldiers, all kinds of soldiers. These soldiers hailed from the more densely populated "inner zones," moving into areas near the Asteroid Belt that interwove with heroic forces.
The government maintained its links across the Solar System in this loose manner.
Yet, these cargo ships did not always return full. Sometimes, the owners of these ships would benevolently hold a lottery, ferrying the lucky winners to their next destination—this was also the primary method of interstellar immigration in this era.
