The Eighth was commanded by Admiral Orben Sel during the conflict. For two-thirds of the war the fleet was assigned to the defence of Andoria. In the final third of the war the fleet was transferred to the front. (LUG RPG: The Dominion War Sourcebook: The Fires of Armageddon)
In the aftermath of the Dominion War, the USS Takeda Shingen was tasked with putting out the fires that erupted along the Federation's borders, and the USS Tethys represented the hopeful return to the spirit of peaceful exploration and first contact.
Squadrons using the newly-built Penguin-class fighter are sent to serve aboard Al-Burak-class carriers assigned to the Eighth Fleet along the Federation/Klingon border in 2231. (The Starfleet Museum: 23rd-Century Carriers and Fighters)