Mars was the fourth planet from the Sun and was the home planet of the Blisk. The Furons and the Blisk began a war against each other. Originally an aquatic world, the Furon Empire launched a war of aggression against the Blisk by drying up Mar's oceans through nuclear, biological, and chemical weapons, which also decimated the Martian population. The Martian War proved to change the course of the Furons, as heavy weaponry cost the Furons their reproductive abilities; and had them to resort to cloning in order to continue life. Although the Furon Empire was satisfied that Mars was made lifeless, its contentment was proven to have blow back as the remaining Blisk survived and planned the downfall of the Furons by eradicating the Humans and starving the Furons of pure Furon DNA. The Blisk, who acted through their base on Solaris, attempted to terraform Earth: Already an ocean planet like the original Mars, the Blisk plan was to further innundate Earth's continents with sea level rise, then irradiate the oceans, which would kill many humans but made it very pleasant for the Blisk.