After the Helghasts had taken full control of Vekta and defeated all UCA and ISA forces, the empire would go on to evolve the humans of Vekta into full-fledged Helghasts through bioengineering/gene therapy program. They would gain access to advanced technology, allowing them to terraform the other three planets to colonize, even Helghan itself. The Helghan Empire then focuses all their attention to the ICSA colonies to occupy and convert the local populations into true Helghasts, restructuring the ICSA into the Helghast Protectorate Administration (HPA). By this point, they would gain more advanced technology for their military and civilians as a whole. With much time and preparation put in, the Helghan Empire launches invasions to annex all the human colonies and star systems that are governed by the UCN and ISA, continuing the war against Earth authority. Now having a more well-trained, well-experienced and highly equipped military, the Helghasts can almost easily overwhelm and overpower ISA forces, despite local ISA branches having full support of the UCA, making it challenging. Eventually with the Helghan Empire having decimated half of every ISA branch forces and conquered and converted most, if not all human colonies, Earth, the UCN and the planetary ISA remnants would soon surrender due to less and lesser resources being received to and from one another, leading them to a steady collapse. This in turn would lead to the destruction and/or seizure of Earth with the Helghast emerging as the victorious race dominating every planetary-wide colony the empire now lays claim.