These components, which were loaded into cargo ships nearly as large as a fuel tanker, could only be destined for one of the moons of Jupiter. Though Saturn, Uranus, and Neptune were all gas giant planets with atmospheres very similar to Jupiter's, colonizing one of the outer gas giants was clearly impractical due to the distance involved and because such a supply line would be impossible to defend during a conflict. WestHem, realizing this, insisted in the sternest manner that the entire Jupiter system belonged to them, not just the single moon of Ganymede. EastHem, not bothering to deny its intentions, countered with the argument that WestHem had no right to claim an entire planetary system when they had no settlements on the planet in question.

This war of words went on and on as the construction process neared conclusion and the cargo ships, with an escort of heavy battle cruisers and stealth attack ships, began to prepare for departure. As the armada left lunar orbit heading for Jupiter, WestHem issued an ultimatum. It warned EastHem that if any of its ships entered the Jovian system, they would be attacked. EastHem ignored this threat and continued, probably figuring that WestHem would back down. WestHem didn't. When the first of the ships crossed the invisible line that had been drawn, the WestHem Marines attacked with short-range space fighters based at Standard City. The cold war that had been the status quo for the past one hundred and twenty years suddenly became very hot.

Mars, as a strategically placed point located between the orbits of Jupiter and Earth, was immediately bombed once hostilities commenced. The WestHem navy had a large base in orbit around the red planet with many of their ships stationed there. Aside from that, Triad, the orbiting space station in geosynchronous orbit, was home to the three major shipbuilding companies that supplied warships for the navy and for cargo transportation. EastHem forces, as they passed, had dropped off three battle cruiser groups complete with attack craft, assault landing ships, and support vessels.