the death of Lt. Marla Astor, Worf brought the orphaned Jeremy Astor into the House of Mogh through the rite of R'uustai (TNG: "The Bonding"). Worf learned of Kurn's existence when Kurn was assigned to the Enterprise as an exchange officer. Kurn specifically asked for the Enterprise so he could observe his brother. He then revealed his true identity, informing Worf that the House of Mogh's rival Duras accused their father of betraying the Klingon Empire by helping the Romulans attack Khitomer. When they and the Enterprise crew discovered that it was in fact Duras's father who betrayed the Empire, Worf, realizing that the powerful House of Duras could not be publicly shamed without throwing the Empire into civil war, accepted a ritual discommendation from the Klingon High Council. While Worf decided to accept this dishonor, it was decided to keep Kurn's true identity secret in order to protect his honor (and the House of Mogh as a whole be left alone) (TNG: "Sins of the Father"). In 2367, K'Ehleyr returned with Klingon Chancellor K'mpec who had come to meet with Captain Picard. When she came aboard, Worf learned he had a son named Alexander. She wanted to marry him but Worf refused because he did not want to share his dishonor with her and their son (TNG: "Reunion"). After K'mpec's death, she assisted Captain Picard with the rite of succession. K'Ehleyr was eventually murdered by Duras when she found evidence of his involvement in the effort to discredit Worf (and why he was discommended). Exercising his right of vengeance, Worf fought and killed Duras with a bat'leth in a duel, allowing Duras's political opponent Gowron to become chancellor (TNG: "Reunion"). A civil war erupted when the Duras's son Toral challenged Gowron. Worf believed Gowron was the legitimate ruler and convinced his brother to bring forces loyal to him into battle on Gowron's behalf. Worf resigned from Starfleet to fight for Gowron and served on his brother's ship. Gowron won the war after Starfleet exposed Romulan support for the House of Duras. In appreciation of his support, Chancellor Gowron restored Worf's honor, allowing Kurn a seat on the High Council as the recognized brother and representative of the House of Mogh (TNG: "Redemption, Part I"). Once the war was over, Worf regained his Starfleet commission, recognizing that he did not fully belong to Klingon society (TNG: "Redemption, Part II"). In