Adelhard's fleet, an Imperial sector fleet, was tasked with protecting the Anoat sector, situated in the Outer Rim Territories. Among its vessels were several Imperial II-class Star Destroyers, notably the Dread Omen.
After the death of Emperor Sheev Palpatine during the Battle of Endor in 4 ABY (a year), this sector fleet became the primary force of Grand Moff Ubrik Adelhard's Imperial remnant. This allowed him to establish the Iron Blockade, effectively sealing off the whole Anoat sector. However, a rebel group called Uprising challenged the blockade, even managing to infiltrate the Dread Omen. By the time of the Galactic Concordance's signing, the blockade had been broken.
The Anoat sector fleet contained a minimum of eight Imperial II-class Star Destroyers, including the fleet's flagship, the Dread Omen, as well as Grand Moff Ubrik Adelhard's personal flagship, the Scepter.
The Anoat sector fleet made its debut in Star Wars: Uprising, a mobile game released in 2015 by Kabam.