Skirmish on Kashyyyk ( Nagai invasion ) A skirmish occurred on the planet Kashyyyk at the beginning of the Nagai invasion of 4 ABY . Battle . Buildup . After the Battle of Endor , Han Solo , Chewbacca , and Lando Calrissian were sent on several missions to bring secure attendees for the First Conference of Free Peoples . After these recruitment missions , the group decided to take a break to visit Chewbacca ' s family on Kashyyyk . Arriving on the planet , the group felt a sense of uneasiness about Rwookrrorro . With Chewbacca leading the way , they made their way to Chewbacca ' s home . On the way the group ' s path to the house was blocked by a strange alien who identified himself as Knife . Knife was curiously unconcerned with the group ' s presence , even when Chewbacca ' s temper got the better of him and he yelled into the alien ' s face . Knife was accompanied by Vargi , Chewbacca ' s brother - in - law who suggested that everyone should go to Chewbacca ' s house for refreshments . Arrival at the tree house brought another curious turn of events when none of Chewbacca ' s family were present to greet Chewbacca . The group decided to wait for Chewbacca ' s family to return , and as they shared drinks with one another Lando and Han began to question Knife ' s true intentions for being on Kashyyyk . Their questions were soon answered when Chewbacca ' s son Lumpy returned home alone . Rogue Wookiees under Knife ' s command took Lumpy as a hostage and held the Alliance members at blasterpoint . Knife revealed that he also had taken Chewbacca ' s wife Mallatobuck captive and he made plans to parade Chewbacca through Kashyyyk , to eventually place him on a slaver ' s ship . Lando and Han were left as prisoners within Chewbacca ' s home under guard by several Wookiees . Battle . As Knife escorted Chewbacca from his house , Han and Lando immediately began to tinker with their cuffs . Lando managed to get their chains loosened , and the two escaped from their captors . While Han tried to keep Chewbacca from being brought onto a slaving ship , Lando made his way back to their ships to send a distress call to the Alliance and bring back weapons to aid with a resistance . Han sneaked behind the enemy and released Chewbacca ' s restraints . Unfortunately , Chewbacca ' s captors realized what was happening and trained their weapons on Chewbacca and Han . Vargi dragged Chewbacca aside and proceeded to beat him for his attempt to escape . Han could not bear to see Chewbacca being unmercifully beaten and struck Vargi . With his attention now on Han , Vargi ' s fury was turned away from Chewbacca and his beating recommenced but with Han as the victim . Meanwhile , Lando had returned with weapons and armed the Wookiees still loyal to the Alliance . As the newly armed group prepared to ambush their enemies , Chewbacca once again broke free and began to attack Vargi . Realizing that Chewbacca ' s outburst was disrupting the loading of Wookiees onto the slave ships , Knife prepared to kill Chewbacca with a tehk ' la blade , but the weapon was shot out of his hand by Lando . The Wookiees overthrew their rogue counterparts just as Chewbacca was able to overpower Vargi , throwing him to the ground . Han had been knocked unconscious by Vargi ' s furious assault , and he woke up just in time to see Knife escaping from the battlefield . Aftermath . The slaving ring that Knife had hoped to establish on Kashyyyk was dismantled , but the Nagai Commander was able to escape . Stealing Lando ' s ship the " Cobra " , Knife sped back to the Nagai headquarters . The Wookiees who had assisted Knife were likely placed into Alliance custody . While Vargi was shamed for his part in the operation , he was also disowned by his sister Malla , and she would later claim that he was no longer her brother . The destruction of the slaving ring marked the last attempt by the Nagai to create a slaving operation in Alliance space .