First Rissa War

5323AD–5335AD. A conflict fought between the Scybrian Polyarchy and the Firstworlds over trade rights along the Scybrian Run star lane. Part of the Mid War period of the Scybrian Wars. The Firstworlds began aggressive customs searches of vessels crossing the Rissa Gateway, beleving them to be carrying supplies and equipment to dissident groups within Far Home Sector, and ultimately resulting in the destruction of a number of Scybrian merchant ships that refused to comply. Scybrian naval forces began escort missions and very quickly the situation devolved into a full-scale naval war.

Scybria, which had used the Long Peace to build up a significant military force in the region, launched an assault and overran a number of worlds in the Rissa Gateway, including Rissa itself, and occupied two systems in Far Home Sector. The experienced Scybrian forces did serious damage, though they faced increasingly fanatical defenders the further they pushed to trailing. Their forces became involved in reducing isolated Firstworlds garrisons and outposts and by 5328AD the campaign had ground to a halt.

At around the same time revelations about Scybrian involvement in the Hidden War came to light. They shocked and enraged the Firstworlds and fuelled a national effort, with vast numbers of volunteers swelling the Firstworlds' military.

As the Firstworlds' new forces entered the conflict it descended into a grinding war of attrition marked by occasional naval skirmishes and commando raids. By 5334AD, as both sides neared exhaustion, an armistice – the so-called False Peace came into effect. The war was finally ended in 5335AD, after protracted negotiations that involved disbanding the People's Liberation Front.