Permafrost was a kind of surface found on planets with freezing temperatures.
The AT-STs assigned to Blizzard Force carried special sensors that ensured Hoth's permafrost could support the larger AT-ATs.
Alexsandr "Trooper" Badure commented that the commandant at the Imperial Academy turned "cold as permafrost" after being corrected by Cadet Han Solo prior to a training mission.
- Assault on Hoth
- Galaxy Guide 2: Yavin and Bespin
- Galaxy Guide 4: Alien Races
- Galaxy Guide 2: Yavin and Bespin, Second Edition
- Star Wars Encyclopedia
- Knights of the Old Republic Campaign Guide
- The Complete Star Wars Encyclopedia, Vol. III
- Nexus of Power
- † Star Wars: Titanium Series AT-ST (Hoth)