Battle of Caladan
the bloodless defence of the Atreides homeworld
The Battle of Caladan was an attempted Harkonnen and Moritani assault on the Atreides homeworld in the expanded novel Dune: House Corrino. Mentat Thufir Hawat repelled it without a shot, using projectors to fake an overwhelming defensive fleet.
The Battle of Caladan was an attempted assault on Caladan, the homeworld of House Atreides, in the expanded novel Dune: House Corrino by Brian Herbert and Kevin J. Anderson. It was planned by the Harkonnen heir Glossu Rabban and Viscount Hundro Moritani of Grumman, but was turned back without a single shot by the Atreides Mentat Thufir Hawat, and ended in an Atreides victory. (Expanded books: Dune: House Corrino)
Background#
Glossu Rabban, called the Beast, commanded the Harkonnen Keep on Giedi Prime, where for a time he operated free of the close oversight of Baron Vladimir Harkonnen and his Mentat Piter De Vries. Anxious about being supplanted as heir by his brother Feyd-Rautha, Rabban sought a way to prove his value to the Baron. To that end he allied with Viscount Hundro Moritani of Grumman to mount a strike against Caladan, the seat of Duke Leto Atreides. (Expanded books: Dune: House Corrino)
The plan#
Moritani urged an aggressive plan built on secrecy and speed. The attack was timed for a moment when the Atreides military was committed off-world on missions to Ix and Beakkal, and was meant to fall on Duke Leto as he returned from Kaitain. Unmarked ships would be used to hide Harkonnen and Moritani involvement, and all transport to and from any arriving Heighliner would be restricted so that Caladan could not summon aid from the Landsraad. (Expanded books: Dune: House Corrino)
The deception#
The plan was undone by timing and cunning. Thufir Hawat, Mentat of House Atreides, returned to Caladan from a mission to Beakkal before the unmarked fleet arrived. Anticipating the assault, Hawat mounted holoprojectors on fishing boats to conjure the illusion of a far larger defensive fleet than the Atreides actually possessed. The ruse convinced the attackers that Caladan's defences were insurmountable, and the unmarked ships withdrew without firing a shot. (Expanded books: Dune: House Corrino)
Aftermath#
The Atreides marked the bloodless victory with a week-long festival, celebrated in the courtyard of Castle Caladan and the streets of the old town with seafood, spice beer, and bonfires on the beaches. Hawat's deception was particularly praised, and Gurney Halleck sang of the triumph by the fires. For all the celebration, the attempt had shown how far House Harkonnen and its allies would go against the Atreides. (Expanded books: Dune: House Corrino)
Frequently asked questions
- What was the Battle of Caladan?
- The Battle of Caladan was an attempted assault on Caladan, the homeworld of House Atreides, in the expanded novel Dune: House Corrino. It was planned by Glossu Rabban and Viscount Hundro Moritani of Grumman but was turned back without a single shot fired, ending in an Atreides victory.
- Why did Glossu Rabban attack Caladan?
- Rabban, called the Beast, was anxious about being supplanted as Harkonnen heir by his brother Feyd-Rautha and sought a way to prove his value to Baron Vladimir Harkonnen. He allied with Viscount Hundro Moritani of Grumman to mount a strike against the seat of Duke Leto Atreides.
- How did Thufir Hawat repel the attack on Caladan?
- Thufir Hawat, Mentat of House Atreides, returned to Caladan before the unmarked fleet arrived and mounted holoprojectors on fishing boats to conjure the illusion of a far larger defensive fleet than the Atreides actually possessed. Convinced the planet's defences were insurmountable, the attackers withdrew without firing.
- What was the plan for the attack on Caladan?
- Moritani urged an aggressive plan built on secrecy and speed, timed for a moment when the Atreides military was committed off-world on Ix and Beakkal and meant to fall on Duke Leto as he returned from Kaitain. Unmarked ships would hide Harkonnen and Moritani involvement, and transport to and from any arriving Heighliner would be restricted so Caladan could not summon aid from the Landsraad.
- What happened after the Battle of Caladan?
- The Atreides marked the bloodless victory with a week-long festival in the courtyard of Castle Caladan and the old town, with seafood, spice beer, and bonfires on the beaches, and Gurney Halleck sang of the triumph. The failed attack showed how far the Harkonnens and their allies would go against the Atreides.
Sources
- BookDune: House Corrino, Brian Herbert and Kevin J. Anderson, 2001 (expanded universe)
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Followed from this entry

Caladan: the ocean world the Atreides left
A rain-soaked world orbiting Delta Pavonis, held by House Atreides for twenty generations. Paul was born there, before Arrakis.

Castle Caladan
Castle Caladan was the official residence of the ruling clan of the planet Caladan and the home of House Atreides for twenty-six generations, until Duke Leto Atreides I was ordered to take up the fief of Arrakis in 10191 AG.

Gurney Halleck
Gurney Halleck was the Warmaster of House Atreides under Duke Leto and later his son Paul, and one of Paul's principal teachers. A warrior, minstrel, and implacable enemy of the Harkonnens, he served the Atreides line from Caladan to the reign of Leto II.

House Atreides
House Atreides was a respected House Major of the Galactic Padishah Empire, ruled by a Duke and seated for twenty-six generations on the ocean world of Caladan. Through Paul Muad'Dib and his son Leto II, the Atreides line rose to rule the Known Universe before passing into a bloodline scattered across the millennia.

Thufir Hawat
Thufir Hawat was the Mentat and Master of Assassins of House Atreides for three generations and one of Paul's teachers. After the fall of the House he was forced into Harkonnen service, where he schemed against his captors before giving his life rather than harm the son of his Duke.

Heighliner: the great foldspace carrier of the Spacing Guild
The Heighliner was the immense starship of the Spacing Guild, a vessel large enough to hold whole fleets of smaller craft and many thousands of passengers. Piloted by melange saturated Navigators, it folded space to cross the universe in an instant, and the Guild's monopoly over it made the Heighliner the quiet arbiter of Imperial power.
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