Priority Sector High Commander

Priority Sector High Commander was a rank used by the Galactic Empire after the Battle of Yavin. There has only be one Priority Sector High Commander prior the destruction of the first Death Star, with him being Dasko Nihos.

Powers of a Priority Sector High Commander
A Priority Sector High Commander had under his/her command the forces of an entire Oversector. Usually a Grand Moff would be in charge, but because of some of them wanting to focus on the politics of their Oversector, a Priority Sector High Commander was appointed.

Dasko was also the only known PSHC (Priority Sector High Commander), who was in fact superior to not only a Grand Moff but to a Grand General, Grand Admiral and Grand Marshal as well.

History
After a period of war between the Rebel Alliance and the Galactic Empire after the Battle of Yavin, the Emperor decided that a reorganization of the Imperial Military should happen.

As a result most Regional Governors gave up their military control and influence to other more capable military commanders. These commanders included: the Sector Commanders, the High Commanders and the PSHCs.

Each one of these commanders had direct control above the forces of their respective territory. However due to strict rules, a Regional Governor had the ability to decommission his commander.

With that in mind in 2 ABY after the Military Reorganization, most Moff and Grand Moffs, reclaimed back what they assumed to be their own personal armies. However Emperor Palpatine sent Darth Vader to find several Moffs that had disobeyed the Emperor's direct orders,for not decommissioning the regional commanders.

Because of the selfishness of most Moffs, the Empire was slowly, slowly crumbling bellow the Rebel Alliance. If the commanders were still in charge, the Empire miht have been able to be concentrated to it's military and politics at the same time.

Legacy
Although the fall of the Empire meant that most of it's officers would be propably taken as hostages or killed by the New Republic, many of these hunted commanders found refugee at PSHC Dasko's Extragalactic Regime.