History and specifics
In the 2260s, Elethia had been at war with Alsand, a planet three days away at warp speed in a neighboring system. The region was spooked by pirate activity and the mysterious insectoid Harst. It was in a location not visited often by the starship USS Enterprise.
In 2268, the Enterprise visited Elethia and picked up the entourage of Queen Apathei, who was emigrating to Alsand to assume the throne of that world's government, an agreement that would end their war. On the outskirts of the system, 100 million kilometers above the plane of the ecliptic, the ship was shot at by seemingly unknown pirates, later exposed as Alsandit vessels conspiring to derail the peace process. (TOS - Star Trek: The Manga - Kakan ni Shinkou comic: "Scaean Gate")