With the Jedi defeated and scattered, Emperor Palpatine wasted no time shoring up his position, amalgamating several offices within the head of state – the supreme leader's seat of power on Coruscant funnelled incredible legal power into the person of the Emperor.
Yet the military machine, which had grown to unfathomable size during the Clone Wars, would not stand idly by and become the mere tool Palpatine hoped it would be. Several Grand Admirals and influential Generals in the Imperial military saw to it that the Emperor became pushed ever further away from the public arena, and under near endless pressure and threats, Palpatine had no choice but to bow to these forces, and physically retreated from public life.
With the head of state now become little more than a puppet, the true power of the Galactic Empire was wielded by a complex network of military commanders and planetary governors. The Senate had been reduced to a largely irrelevant chamber for debate; in theory still a mechanism for dissent but in practice a mouthpiece for Imperial propaganda, broadcast across the entire HoloNet.
The Galactic Empire saw immediately that, as the Republic before them, they would need the services of new guardians to ensure the security of the New Order. And so, the Sith soon became the enforcers and enactors of Imperial will, just as the Jedi had overseen the rigid justice of the Republic before it.
When Palpatine died less than a decade after the end of the Clone Wars, a sudden and furious clamour began, to install the next Emperor, and many feared it would lead to a new Clone War, or worse.
Several notable Grand Moffs, prominent governors, and military officials all moved to claim their right to succeed Palpatine as Emperor. After several tense weeks of negotiation, the Imperial Senate declared Tyrasta, Governor of Malastaire, the next head of state. Yet Tyrasta was dead within a month, a victim of having attempted to return true power to the Imperial Throne.
The next Emperor was, perhaps fittingly, a timid figure, a lowly governor of a forgotten colony not far from Alderaan, an easily manipulated man who appeased the Imperial warlords and their Sith enforcers. Unlike his predecessor, Emperor Fisk ruled peacefully for several decades, appearing only to announce major reforms, public events and holidays, and to reassure the public of the ongoing primacy and benevolence of the New Order.