Where the fuck did the empire keep those giant snow walkers? The motherfuckers got a cannon that can destroy a planet, but they have to do a frontal assault on a rebel base with imperial marines and special forces? Seems kinda gay. They would have wiped out Skywalker, Leia and everyone.
I think the answer is that Vader is a faggot who needed Luke to overthrow the emperor so he could rule the galaxy. Well from what I've seen of the galaxy its really not all that great. They got giant worms living in asteroids. Droids. All kinds of illegal immigrants.