Hilgroen was a theater of operations during the Robmeybur Rebellion.

Following the outbreak of the Rebellion at Dantang, Roga Danar was transferred to Anabar Squadron at Hilgroen for the duration of the campaign, during which he was injured twice.

In 2366, this location was mentioned in Danar's military service records, which were accessible to the crew of the USS Enterprise-D via the Angosian senatorial database. (TNG-R: "The Hunted", okudagram)

Hilgroen was named after CBS Digital Technical Operation Department employee Hilary Groner.
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