The Jerion were a gray-skinned civilization from the planet Shiva Omicron IV. They severely persecuted the other inhabitants of the planet.

This led to the Galahad Incident, a serious violation of the Prime Directive. In 2210, Captain Joshua Grant of the USS Galahad neutralized the Jerion armies with his phasers during a massacre, causing their extermination. (TOS video game: 25th Anniversary)

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