Page "Salusa Secundus" Paragraph 6

The Brian Herbert / Kevin J. Anderson prequel trilogy Prelude to Dune ( 1999-2001 ) establishes that, after centuries as the capital of the Corrino Padishah Empire, Salusa is devastated by atomics before the events of 1999's Dune: House Atreides.

Padishah Emperor Hassik Corrino III relocates the Imperial throne to Kaitain, and the renegade House which had perpetrated the attack is exterminated, their name erased from history.

Salusa Secundus is intentionally left as a barren wasteland.

The interquel novel Paul of Dune establishes that House Tantor had been responsible for the destruction of Salusa, and House Moritani are secretly descended from them.