Garadius IV is an inhabited planet, which faced internal problems in the 2360s.
In 2368, the Enterprise-D was on the way to this planet, when the ship helped a disabled Romulan science vessel. After finishing the repairs of the Romulan ship, the Enterprise received a message, that the diplomatic situation on Garadius IV was deteriorating. Just before going on warp enroute to Garadius IV, which would have destroyed the ship due to the Romulans secretly transferring muons to the dilithium chamber, the ship was saved by Ro Laren and Geordi La Forge, who told the crew of the Romulan plot. The muons were subsequently removed, before the Enterprise resumed course to Garadius IV. (TNG: "The Next Phase")