Hoth is a barren ice planet just on the outskirts of the the Mid-Rim of the Star Wars galaxy. The base is located on the sixth planet of the system. The planet is located near to Bespin. It is the location that The Rebel Alliance retreat to after dealing a devastating blow to the Galactica Empire at the end of Star Wars IV - A New Hope. It saw the Imperial forces land and attack with AT-AT Walkers, huge compat vehicles that walked on four legs. When the Imperial forces landed, the Rebel Alliance attempted to force their way through the planet blockade with two X-Wing Fighers giving each transporter protection.
The planet is continuously being hit by asteroids which the Rebel Alliance are lucky not to be hit by any. Unlike Starkiller Base which is a hollowed out snow world, there is no sign of vegetation but there are native life in the form of Wampa and Tauntaun. It is assumed that those creatures are native to the planet and not been bought there by the Alliance.
When Han Solo is forced to destroy an Imperial Droid which got alerted to Chewbacca's presence, the Imperial fleet was ordered there by Darth Vader. The fleet came out of hyperspace too close to the planet by Admiral Ozzel which would then cost Ozzel his life by a Force strangulation by Darth Vader. It wasn't Ozzel who caused the Empire to be alerted but the destruction of the droid. The Rebel Alliance was already making escape plans from the planet when the Empire turned up.
The Wampa is one of the native species of creatures on the planet. It is based on the fictional Yetis in the Himalayas and Bigfoot in the America. It is extremely tall, powerful and carnivorous. The Wampa catches Luke Skywalker when he's off guard and takes Luke back to its cave. The Wampa plans to eat Luke but Luke wakes up in time, grabs his lightsaber and chops off a Wampa arm.
A second Wampa was supposed to be seen moving through the Rebel Alliance Base during the attack by the Imperial forces but the scene was cut from the final version of the film.
In World of Wacraft, the game plays homage to Luke Skywalkers escape. If you're about to do all the quests in the Winterspring, you will come across this. You will click on a postbox and then falls asleep only to be woken up later upside down in a cave. The quest sees you escape and kill the Yeti creature.
Tauntauns are the complete opposite to the Wampa in that they are not fierce and presumably not carnivorous creatures. They provide the Rebel Alliance to travel across the planet given the lack of land vehicles. Han Solo describes them as being extremely smelly as he claims when he is cutting open one to provide protection for Luke Skywalker who has just escaped from the Wampa.