As part of Admiral Ackbar's strategy to train the fresh members of the New Republic Defense Force and weaken the Yuuzhan Vong, Admiral Traest Kre'fey initiated a raid against Duro, a planet seized almost two years prior. The Yuuzhan Vong, reinforced by the Ylesian Republic, possessed three cruisers within the system, finding themselves outnumbered by Admiral Kre'fey's nine-ship fleet by a ratio of three to one. Following the disruption of the planetary yammosk, Kre'fey deployed the Jedi-led squadrons as the initial wave. After the destruction or disabling of the Yuuzhan Vong cruisers, the fleet established an orbital position and commenced an orbital bombardment of Duro, targeting any Warrior grashals, Shaper damuteks, and enemy-occupied starports. Subsequently, seven more Yuuzhan Vong capital ships entered the fray. Nevertheless, Kre'fey opted for a cautious approach, commanding the fleet to retreat into hyperspace.