The Great Spice War was a military campaign by House Corrino that took place before the birth of Paul Atreides. Declared by the 81st Padishah Emperor Shaddam Corrino IV after news that project Amal was almost complete, the purpose of this campaign was to prevent any Great House from resisting the use of Amal as a Spice Melange alternative once it was complete. Half the captured spice was to go to the Spacing Guild and the other half would go to CHOAM as a reward for their cooperation. The war eventually ended in disaster for the Imperial House as Amal was never completed to perfection.