Mandalorian Civil War (Imperial Era)

Following the events of the Siege of Mandalore, Bo-Katan Kryze, the leader of the Nite Owls, ascended to the position of Lady of House Kryze and became the Regent of Mandalore. After the Galactic Republic underwent a reorganization to become the Galactic Empire, Mandalore fell under the occupation of the Empire. Kryze's refusal to submit to Emperor Palpatine led to her betrayal by the Saxon clan under the leadership of Gar Saxon. Subsequently, Saxon was appointed as Viceroy and the Emperor's Hand on Mandalore. Saxon and his followers later transitioned into the Empire's Super Commandos.

During the time, Imperial Academy cadet Sabine Wren invented a weapon referred to as The Duchess. Upon witnessing the Empire testing the weapon on her people, Sabine destroyed it and fled. Countess Ursa Wren, a former member of the Nite Owls, was compelled to pledge allegiance to the Empire by permitting Tristan Wren to enlist in the Super Commandos. Her husband, Alrich Wren, was taken as a prisoner by the Empire. The Mandalorian Protectors, under the command of Fenn Rau, departed from Mandalore and established a base on the Third Moon of Concord Dawn. The Protectors then forged an agreement with the Empire.

In 3 BBY, the Phoenix Cell approached the Protectors, seeking an alternative route to Lothal. Initially, Rau refused to grant them passage. However, Rau was captured by Jedi Kanan Jarrus and Sabine. Rau instructed his Protectors to permit their passage and to withhold information about his capture from the Empire. Although Rau was held as a prisoner, Saxon discovered that the Protectors were facilitating the passage of rebel ships through Concord Dawn, leading him to decide to eliminate the Protectors as traitors to the Empire.

Later, in 2 BBY, Rau accompanied Sabine and Ezra Bridger to investigate the Protectors' base. Upon their arrival, they discovered that all the Protectors were dead. Shortly thereafter, they were ambushed by Saxon and his commandos. Rau and Sabine overheard Saxon revealing that he had intentionally allowed the Rebels to utilize Concord Dawn to lure Rau back, intending to complete his mission of eliminating him. Rau contemplated leaving, but ultimately chose to rescue Sabine and Bridger from Saxon. Following their escape, Rau made the decision to join the rebels.

After a skirmish involving Darth Maul, Sabine retrieved the Darksaber from the Nightsister lair located on Dathomir. Initially, she declined it and handed it over to Jarrus. However, Rau, Jarrus, and the other members of the Spectres persuaded her to permit Jarrus to train her, with the aim of uniting both her family and Mandalore in the fight against the Empire. Despite her initial reservations, Sabine demonstrated her ability to wield the Darksaber effectively.

Subsequently, Sabine, accompanied by Rau, Jarrus, and Bridger, returned to her clan's stronghold on Krownest. There, she was attacked by several warriors from her clan, led by her brother Tristan. Following the crash landing of the Phantom II, Jarrus, Bridger, and Sabine were taken to the stronghold, while Rau and Chopper remained concealed. Initially, Ursa refused to listen to her daughter until she revealed the Darksaber. Ursa then engaged in a conversation with her daughter but remained shocked that she had designed weapons that had been used against them. Sabine informed her mother that Saxon was responsible for the extermination of the Protectors. Despite this revelation, Ursa disclosed that she had disowned her daughter to shield their family from Saxon and the Empire's retaliation.

Despite the reunion, Ursa contacted Saxon. In exchange for the Darksaber and the Jedi, Ursa was promised that her daughter would be spared. Ursa later spoke with Jarrus, expressing doubt that he knew her daughter better than she did. However, she was surprised to hear that her daughter had fought Saxon previously as his commandos arrived. Ursa gave him the Darksaber and the Jedi, despite Sabine's objections. However, Saxon betrayed her and declared Clan Wren traitors to the Empire.

As they prepared for a gunfight, Rau broke into through a window and returned Jarrus' and Bridger's lightsabers. The warriors of Clan Wren fought the commandos. When Saxon attempted to kill Ursa with the Darksaber, Sabine was given Bridger's lightsaber. The two fought until Sabine was able to reclaim the Darksaber and used both it and Bridger's lightsaber at Saxon's throat. However, Sabine refused to kill Saxon, who was instead killed by Ursa. Despite this victory, Ursa stated that they could not accept the rebellion's help and that Mandalore must stand by and help itself. Sabine chose to stay behind and help her family and Rau find Mandalore's true leader.

Clan Wren was later approached by Bridger, who asked for help against the Imperial Seventh Fleet's attack on Atollon. Despite reservation, Ursa allowed her daughter, Rau, and several other volunteers to take out the last Interdictor destroyer in order to let the survivors of Phoenix Cell and the Massassi Group to retreat. Together, Bridger and Clan Wren warriors were able to take out the Interdictor and escape with the remaining rebels.

During the Mandalorian civil war, Sabine and her younger brother, Tristan, arrived at the statue of Tarre Vizsla on Mandalore and discovered that the Empire had built an outpost situated on it. Sabine and Tristan were able to destroy the outpost and return the statue to its original state.

Later, Sabine and her clan, along with Spectres Jarrus and Bridger, attacked an Imperial prison in an attempt to rescue her father, Alrich. There, they fought against the Empire's forces and commandos, now under the command of Gar Saxon's brother, Governor Tiber Saxon. As Saxon deployed reinforcements, Clan Wren was joined by the Nite Owls of Clan Kryze under Bo-Katan. Despite their victory over Saxon's forces, Alrich was not there.

Clans Wren and Kryze learned that Alrich was taken aboard a convoy under Captain Hark bound for Sundari. Together they attacked the convoy near a canyon. As Sabine took out the scout troopers and threw a paint bomb at the convoy, Hark informed Saxon that the convoy was under attack and was informed that reinforcements had been sent and the weapon was being prepared. Clan Kryze, Rau and the Spectres continued their attack on the convoy as Bridger boarded to free Alrich. As the convoy approached the edge of a cliff, Bridger gave Alrich his jetpack to jump before the Imperial Troop Transport went off the cliff. Sabine and Alrich briefly reunited before Imperial reinforcements arrived. Despite Ursa's belief they would have two victories, the Empire deployed a AT-DP of unusual design. Sabine heard a noise through her wrist comm that made her realize it was her weapon being deployed. Sabine told Ursa and Tristan to get out of there. After the weapon was used, all Sabine found were disintegrated bodies and damaged armor.

At first, Sabine believed Ursa and Tristan were dead, but they had survived. The Wrens, along with Rau and the Spectres made their escape thanks to Clan Kryze's gauntlet fighter. Bridger and Kryze were able to destroy a pair TIE fighters. Following the weapon test, Saxon contacted Grand Admiral Thrawn and told him of it's success against the Mandalorians' armor. Thrawn however wanted it to have greater range in order to bring the rebellious Mandalorians down. Thrawn suggested capturing the weapon's designer, Sabine.

At the Kryze command camp, the warriors present there were disgusted by how Sabine created the weapon. However,Sabine's family stood by her and Kryze was able to convince everyone to destroy the weapon. Together, they planned to sneak aboard Saxon's Star Destroyer stationed at Sundari. They planed to destroy both the weapon and erase the weapon's designs.

As they boarded the Star Destroyer, they saw that the weapon core was not there. As Jarrus, Bridger, and Chopper erased the weapons designs from the database, the Mandalorians fought both the commandos and stormtroopers. As Kryze and Sabine found the Duchess, they were both subdued by Saxon who demanded that Sabine increase the weapons capacity. Kryze and Sabine were tortured by the Duchess until Sabine acquiesced to his wishes, despite Hark's and Kryze's objections to this. After Sabine fixed the Duchess, Saxon reactivated it. However, Sabine had altered to target stormtrooper armor and the Duchess then targeted Saxon and the stormtroopers all across the Star Destroyer. At first, Sabine wanted to kill Saxon for rebuilding her weapon, but Kryze convinced her to destroy and fight with honor. Sabine used the Darksaber to destroy the Duchess and both teams and the Spectres escaped as the Star Destroyer was destroyed.

Upon their return to the camp, Sabine declared to Kryze that she had demonstrated her worthiness to lead Mandalore. Despite her own doubts, Ursa and Sabine assured Kryze that their people were willing to follow her leadership. Kryze was then presented before a gathering of warriors representing Mandalore's various clans. With the backing of Clan Wren and the Protectors, Kryze accepted the Darksaber and embraced her role as the leader of Mandalore.

Thus, the Mandalorian Civil War came to an end, with the planet regaining its independence, although it remained under threat from the Empire. Following the events on Mandalore, Sabine chose to rejoin the Spectres and the Rebel Alliance on Yavin 4. In response to the loss of control over Mandalore, the Empire initiated a campaign known as the Great Purge of Mandalore.