Blizzard 4

Blizzard 4 was an All Terrain Armored Transport that was part of Blizzard Force was present at the Battle of Hoth, commanded by Colonel Starck.

History
Staffed by an experienced crew, Blizzard 4's role in all engagements was to seek out new terrain uncovered by the initial offensive thrust and unload troops to hold it.

In an attempt to impress Darth Vader, Starck and his group went through the treacherous Kerane Valley.

Later in the battle, Luke Skywalker, his snowspeeder crippled and crashed, narrowly dodged the AT-AT's crushing foot, before grappling to its underbelly with a harpoon gun, cutting through the armor with his lightsaber, and using a thermal detonator to destroy it.

Non-canon appearances
In a skit from Robot Chicken: Star Wars, Luke Skywalker, similar to the movie, managed to grapple the Blizzard 4's underbelly using a harpoon gun, cut through the armor with his lightsaber, and threw a thermal detonator into the hole. However, unlike the film, it was revealed that he threw the detonator within an occupied lavatory, with it exploding and downing the AT-AT.

Appearances

 * Star Wars: Galactic Battlegrounds
 * Star Wars: Rogue Squadron III: Rebel Strike
 * Star Wars Episode V: The Empire Strikes Back radio drama
 * Star Wars Episode V: The Empire Strikes Back junior novel
 * Star Wars Episode V: The Empire Strikes Back
 * Star Wars 41: The Empire Strikes Back: Imperial Pursuit
 * Star Wars 78: Hoth Stuff

Non-canon appearances

 * LEGO Star Wars: The Complete Saga
 * Perfect Evil
 * LEGO Star Wars II: The Original Trilogy

Notes and references
Blizzard 4