During the Chubbit resistance against the Imperial forces occupying their planet, Aridus, the Chubbit resistance engaged in a battle at the Iron Tower. This conflict was strategically designed to enable their Human comrades to gain access to the structure. The Chubbits executed a surprise attack on an Imperial patrol speeder from a higher location, resulting in its obliteration. Had this not occurred, the speeder would have intercepted Luke Skywalker and a man who purported to be Obi-Wan Kenobi, thus preventing their entry into the tower for its demolition. Although the tower was required to counteract Aridus's ionized atmosphere and enable electronic functionality, it negatively impacted the nervous system of the indigenous Chubbits, resulting in numerous deaths. However, the Obi-Wan Kenobi impersonator's true purpose was a carefully designed deception to deliver Skywalker into the hands of Darth Vader, who was positioned inside the tower. Ultimately, the actor experienced a change of conscience and demolished the tower by activating a lever, thereby liberating the Chubbits from its harmful consequences and facilitating Skywalker's departure. Darth Vader narrowly avoided death during the collapse, but he was rescued by the Human smuggler Wrenga Jixton.