Odusseus Atreides was a child during Feyd I usurpation.
Eventually he escaped and enlisted in the Imperial forces under the name Uulavar Treys. Commandeering a ship, he gave it at Beta Coriolanus and bought the assistance of the Guid for a surprise raid on Ibleam III and IV in 1096 AG which marked the beginning of the end of the usurpation. That raid became a classic example of hit-and-run tactics and cited in military textbooks for millennia.
The Imperial forces losed ground to the rebel attacks and only a few words remained in their hold.