The Battle of Sadako was a major engagement that occurred merely hours after the Battle of the Bliss in the Swarm War; where the Swarm attempted a multi-pronged attack of UCG-controlled space in a plan to completely disorient allied forces and gain a strong foothold in the centermost areas of the Milky Way Galaxy. This plan was thwarted at the Battle of Sadako, where Lord Indromil, Captain John Bradley, Commander Gerard Reeson and Vice-Admiral David Hoffman lead a force of Allegiance, Ve'nek and UNSC Naval battlegroups against an overwhelming Swarm fleet of biblical proportions. After the UCG's victory at Sadako, the Swarm siege on the Mid-rim was broken and the allies managed to push enemy fleets back into the outer rim; successfully avenging the death of Indromil's close friend, Thakan D