Garon II

From Memory Alpha, the free Star Trek reference.

Garon II is the second planet of the Garon system.

The USS Wellington experienced a disastrous away mission at Garon II in the mid-2360s. During the mission, Lieutenant Ro Laren disobeyed direct orders, resulting in the deaths of eight of her fellow officers. Ro was subsequently court martialed for her actions. She was demoted to the rank of ensign and sentenced to imprisonment in the stockade on Jaros II. (TNG: "Ensign Ro")

During Ro's memorial service later that year, Jean-Luc Picard stated that if she hadn't lost her rank as a result of the incident, he felt she would have been a lieutenant commander by late 2368. (TNG: "The Next Phase")

Picard noted that the incident resulting in Ro's demotion took place on "Garon IV" rather than "Garon II."