The Dark of Night
Early in the Galactic Civil War, prior to the destruction of the first Death Star, the planet was the site of an Imperial base. The Imperials there were defeated by a Rebel force led by Colonel Odan. The Alliance originally considered basing themselves there, but chose Yavin 4 instead.
The planet was also the homeworld of the native Snow Demons, also known as Akurians, which the Empire hunted without realizing that they were particularly intelligent. After liberating the planet from the Empire, the Alliance allowed these creatures to reclaim their frigid world.