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Alderaan became one of the earliest members of the Galactic Republic and was known to be a prestigious, peaceful world, focusing on art and culture. The people of Alderaan were known to help other worlds in need and during the Clone Wars arranged a conference on war refugees.
Senator Bail Organa supported Supreme Chancellor Sheev Palpatine during the Wars, but after the Chancellor amassed more and more power during the conflict, his loyalty turned. Towards the end of the war, Organa collaborated with other senators to oppose Palpatine if he refused to give up his wartime powers.
After Palpatine transformed the Republic into the Galactic Empire and declared himself Emperor, Organa began organizing rebel groups and supplying them with warships and other materiel. Alderaan became a hotbed of rebel activity, which brought about the planet's end. After completing the Death Star battlestation, Grand Moff Tarkin targeted Alderaan and destroyed the planet in one shot. Despite intending its destruction to be a show of force to other rebellious star systems, Alderaan became a martyr to the rebel cause.
- Star Wars: Episode I The Phantom Menace (Mentioned only)
- Supply Lines (Mentioned only)
- Lightsaber Lost (Mentioned on datascreen)
- Ghosts of Mortis (Vision to Anakin Skywalker)
- Escape from Kadavo (Mentioned on datascreen)
- Star Wars: Episode III Revenge of the Sith
- Lost Stars
- A New Dawn (Mentioned only)
- Star Wars: Story Before The Force Awakens (Mentioned only)
- Ezra's Gamble (Mentioned only)
- The Rebellion Begins (Mentioned only)
- Droids in Distress book (Mentioned only)
- Blood Sisters (Mentioned only)
- A Princess on Lothal (Mentioned only)
- Star Wars: Episode IV A New Hope (First appearance)
- A New Hope Read-Along Storybook and CD
- Star Wars: Princess Leia, Part I (Mentioned only)
- Star Wars: Princess Leia, Part II (Flashback)
- One Thousand Levels Down (Mentioned only)
- Star Wars 2: Skywalker Strikes, Part II (Mentioned only)
- The Empire Strikes Back: So You Want to Be a Jedi? (Indirect mention only)
- Star Wars: Uprising (Mentioned only)
- Aftermath: Life Debt (Mentioned only)
- Star Wars: The Force Awakens novel (Mentioned only)