Blizzard 4
this was the callsign of one of the Imperial AT-AT walkers that was dispatched ot the planet Hoth during the height of the Galactic Civil War. During the Battle of Hoth, the Blizzard 4 walker was under the command of Colonel Starck. The walker was later sabotaged by Luke Skywalker, who used his lightsaber to open a hole in its belly. He then threw a grenade into the walker, which promptly exploded. Starck and all aboard were killed in the the resulting destruction of Blizzard 4.