Battle of Mon Cala The Battle of Mon Cala , also known as the Battle of Mon Calamari , was fought during the Clone Wars on the aquatic world of Mon Cala . The battle was a result of a schism between the Mon Calamari and Quarren species who lived on the planet , as the Quarrens rebelled against the Mon Calamari with the support of the Confederacy of Independent Systems . The Grand Army of the Republic , Jedi Order , and the Gungan Grand Army came to the defense of the Mon Calamari to fight the invading Separatist Droid Army . The Mon Calamari and the Quarren reunified by the battle ' s end , and the Separatists were repelled . Prelude . During the Clone Wars , the King of Mon Cala , Yos Kolina was found murdered . This left his son , Prince Lee - Char to maintain peaceful coexistence between the Mon Calamari and Quarren . During this time , the Quarren Isolation League under Chieftain Nossor Ri believed that the prince was too young and wanted a Quarren king . During this time , the Separatist Alliance ambassador , Commander Riff Tamson started to stir up the arguments between the Mon Calamari and Quarren . Mon Calamari Guard Captain Gial Ackbar then asked the Republic to send Senator Padmé Amidala and her bodyguard , Jedi General Anakin Skywalker , to help mediate the dispute . However , the Quarren refused the Republic ' s intervention and ended the negotiations . Before leaving , Ri offered his condolences to the young prince on his loss . Amidala , Skywalker and Ackbar then contacted Jedi Council members Yoda and Mace Windu , informing them of the impending civil war between the Mon Cala and Quarren . Windu thus dispatched a regiment of SCUBA trooper under General Kit Fisto and Commander Ahsoka Tano . He also told Ackbar to prepare Mon Cala ' s military for the fight . Mon Cala ' s senator , Meena Tills then appointed Ackbar as the prince ' s personal protector , much to his chagrin . Tamson was then contacted by Count Dooku , who dispatched " Trident " - class assault ships and Aqua droid s to bolster the quarren forces . Tamson told Dooku that Ri and the Quarren were with them completely . However , Dooku promised that Mon Cala would be his to control . At Mon Cala city , the prince reassured his people that the Quarren would not attack them . The Battle . Battle for Mon Cala city . Tamson then led charge of the Quarren and the Aqua droids against the Mon Calamari at the city . They held their ground alongside Skywalker . Skywalker urged Ackbar to take the prince out of the war zone . However , the prince refused to leave his people . Republic reinforcements then arrived . Clone Captain Rex , Kit Fisto and Ahsoka Tano then deployed the SCUBA troopers from the gunships along with several OMS Devilfish subs to reinforce the Mon Calamari forces . Tamson tore his through the clones and Mon Calamari . Skywalker then briefly lost his helmet to a pair of Quarren soldiers . Tano then gave him his helmet back . Tano led Prince Lee - Char to safety , only for Aqua Droids to follow them into the tunnels . Tano let go of her sub , allowing it to crash into the Droids . Tamson then smashed through the tunnels attempting to get to the Prince before he was distracted by a group of Mon Calamari soldiers ( whom he killed shortly after ) . Amidala called for Skywalker to assist her in helping Senator Tills away from the battle , and told them of their location in the palace . Fisto then reported that the Separatist and Quarren forces were returning to their ships , a sign that the Mon Calamari and Republic had won that round . Fisto then noticed the Droids were amassing in the coral , and were most likely preparing for another assault . Unknown to them , Tamson was delivering reinforcements from his home planet in the form of secret weapons that were half - machine and half - monster invincible “ Hydroid Medusa ’ s . ” These hydroids operated similarly to large jellyfish , with tentacles that shocked and killed anyone they touched . Ackbar reminded all forces to not fire until Prince Lee - Char gave the command . Upon firing , they noticed the true invincibility of the hydroids . Separatist and Quarren forces then attacked from the sides , essentially cornering the Mon Calamari forces . When asked where they could retreat , Prince Lee - Char said they should not . Ackbar then told the Prince that there was a time to attack and a time to retreat , and this was not a time to be brave . They then decided to retreat to the caves while Fisto held off the enemy . Fisto then allowed his sub to crash into one of the hydroids , causing it to explode . Tamson and Nossor Ri then searched the battle ground for survivors , but had a slight altercation due to Ri ’ s inability to provide backup during the phase of the battle , so Tamson told him that if it was to happen again he would kill him where he stood . The Prince decided the best course of action was to attempt to escape in Senator Amidala ’ s ship . While Fisto crates a diversion , the rest of the group stole a few subs to get to the surface faster . Tamson , however , has already set a trap and blew up the Senator ’ s ship . While holding onto the ship ’ s debris to take them to the bottom of the water , the group decided to split up to protect the Prince ’ s whereabouts . Tano and Fisto took Clone Commander Monnk , another Clone , and the Prince while Skywalker took Captain Ackbar and Senators Amidala and Tills . After realizing that clone forces would take too long to be sent as reinforcements for the troubled army on Mon Cala , Jedi Mace Windu , Obi - Wan Kenobi , Yoda , and Saesee Tinn decided they should contact the Gungans of Naboo for assistance . Master Yoda personally contacted them , to which Jar - Jar Binks argued that their longtime ally of Senator Amidala would need their help , which persuaded the Gungans to join the fight . Skywalker ’ s group then tore down the building which housed the sonar and tracking devices , leading Tamson to order his forces to prepare for an attack . Gungan forces then arrived on a Venator - Class Star Destroyer , turning the tide of the battle in favor of the Republic and Mon Calamari . Tamson ordered all reinforcements to the area where the Prince was , and had the Trident - Class ships create a vortex to disable many of the soldiers . Tamson himself then entered a fight with the Prince , while Tano and Fisto fought off Aqua Droids . Skywalker then worked with Ackbar to sever one of the legs of the Trident ship , causing the vortex to stop . All forces other than Tano and the Prince were captured by Droids and taken prisoner and interrogated to discover the location of the Prince . Although Senator Ri believed the battle had been won , Count Dooku reminded him that he had entered the war on the side of the Separatists , and Tamson ’ s Karkarodon soldiers arrived , to which Dooku said to proceed as planned . Prince Lee - Char and Ahsoka Tano snuck into a prison camp to tell the prisoners of the Prince ’ s plan to unite all of the prisoners ( Mon Calamari , Quarren , clones , and Gungans ) to revolt against the Separatists and Riff Tamson . Tamson then revealed to Nossor Ri his original plan to become the ruler of Mon Cala . After being captured , Lee - Char plead with Nossor Ri to join them against the Separatists , to which he had no response . Tamson announced he had ordered Lee - Char ’ s public execution to take place . During the execution , a Quarren secretly told Captain Ackbar that the Quarren and Nossor Ri were with them , and handed him a weapon . The prisoners all then revolted and fought back . Prince Lee - Char and Riff Tamson then got into a fight with each other , where Tamson revealed he had assassinated the former King . The Prince was able to kill him with one of Tamson ’ s own exploding knives .