Aduel took place in3 ABY in theDark Side Cave on theplanetDagobah, betweenLuke Skywalker[1] and theDark Spirit, who had assumed the shape ofDarth Vader.[3] It was a part of Skywalker'sJedi training and occurred because hisJedi MasterYoda had asked him to enter the cave so he could face his darkest fears. Beforehand, when Skywalker inquired whether there was anything that posed as a threat, Yoda cryptically replied that the only thing to threaten him was "what Skywalker carried in with him," and also advised that Skywalker not bring his weaponry inside as he won't need them. Skywalker seemingly got the upper hand,beheading the apparition. However, when the fake Vader'shelmeted head hit the ground, its mask exploded, revealing the face of Skywalker himself.[1]
