Certainly, windbane. From the official Killzone.com story:
The UCN grows concerned at the increasing domination that Helghan is exerting over star travel and space trade - traditionally under UCN control. They also become frustrated that the Helghan are creating vast wealth off the backs of colonial endeavors that the UCN itself has underwritten. It levies stricter controls and tariffs on all space traffic and taxes the colonies more heavily than ever before - using the money to expand the UCA, the UCA Navy receiving the bulk of the new budget. For the first time the UCA Navy develops large scale troop transports and the new Heavy Cruisers - warships clearly designed principally to smash the ISA fleets of the outer colonies and invade them by force.
As part of these new regulations several privileges granted to the Helghan Administration as part of the Helghan/Vektan Purchase are rescinded - specifically the right to a large home fleet and tariffs on shipping. The Helghan Administration refuses, but does agree to high-level talks on a compromise solution. Back home, however, the wealthy people of Vekta and the powerful companies in orbit around Helghan pressure the Helghan Administration not to budge on the issues of tariffs or self-defense.
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