After Ariah's retirement, Taisho Ketsurui Ayame assumed command of the Third Expeditionary Fleet.
Elysian separatists made a daring attack on the fleet headquarters at Tami. During the attack, the Tami Star Fortress was crippled, and the upper levels of the Third Expeditionary Fleet's command structure were decimated.
Taisho Henry Chen was given the task of piecing the broken fleet back together. The fleet headquarters were relocated to Anisa, were new ships were commissioned and new officers were recruited. Accordingly, the fleet was re-assigned the responsibility of exploring and patrolling the Empire's northeastern frontier.
Henry took the opportunity to make the fleet one of the most culturally diverse in the Star Army of Yamatai, which made it especially suitable for diplomatic missions.
When Taisho Ketsurui Yui decreed that only Nekovalkyrja and Yamataians were allowed to remain in the Star Army of Yamatai, many Nepleslians and Geshrins in the Third Expeditionary Fleet willingly upgraded to Yamataian Species bodies. However, many others, along with Elysians, and minor species such as Elves and Trolls, left the Star Army altogether. This left the command structure of the Third Expeditionary Fleet in tatters.
After the decimation of most of the fleet's ships during the failed operation at Valaad, the 3rd XF underwent restructuring under the guidance of Fleet Planner Shosho Kawazoe Sekai, with ships donated by the Fifth Expeditionary Fleet and from Nataria Fleet Depot. The protocol of not reassigning used registry codes was also adopted at this time, as a way of honouring those who gave their lives in service.
The 3rd XF provided aid in the form of its Jihi-class medical ships as a virus spreads among the natives of Khorovarolor.