In "Star Wars: Episode V – The Empire Strikes Back," Luke Skywalker is trained by Jedi Master Yoda on the swampy planet of Dagobah. Luke is led to Dagobah by the advice of the Force-ghost of his former mentor, Obi-Wan Kenobi (also known as Ben Kenobi), who tells him to seek out the ancient Jedi Master for training. Yoda is initially reluctant to train Luke, fearing that he has the same potential for turning to the dark side as his father, Anakin Skywalker. However, he eventually agrees and imparts significant Jedi teachings and knowledge of the Force to Luke, which are essential for Luke's development into a Jedi Knight and are pivotal in his confrontation with the Sith Lord, Darth Vader, and the Emperor in the subsequent installments of the Star Wars saga.