Soon after the unification of the continent and the entirety of the known world under the Alammar Empire, William the Great died from heart complications and his son, Alfred rose to power, inheriting a whole host of problems.
For one, conquering an entire continent within 40 years tends to leave one overextended, without much time to cover your bases. Significant cultural divides and conflicts had erupted all across the new Empire, with little to differentiate regions and borders of administration. This also meant that the military governors appointed to these regions were beginning to fight amongst themselves over territory. Alammar itself was only held together by the Imperial Army keeping any potential rebels or separatists in check, however that reliance couldn't last, and some top generals in the army were beginning to get funny ideas about running the Empire themselves. As if to double down on this bad fortune and circumstances, the gods had seemingly just abandoned Alammar. Seeing as Aflred wasn't an Emissary, he had no chance to actually commune with the gods, and Prophets couldn't get a clear answer or advice from them.
The political situation was so bad in Alammar that when William died and Edward was coronated, the announcement had to be withheld from everyone except the Dowager Queen and a handful of other trusted higher ranked officials. It was clear that Alfred, the new High King, needed to do something quick, otherwise the Alammar Empire would fade away in a heartbeat, like a bad dream.
Alfred immediately went to work, drawing up borders for different provinces of the Empire, utilizing cultural lines and the borders of old, now conquered states. After drawing up the provinces, he set about removing the military governors from power, weakening the strength of the Imperial Army in internal politics, and establishing a competent civilian government in each province, along with giving the Fervoni Holy Union a voice politically and actually ceding some of his absolute power to the people and the rest of the civilian government, earning support from many different bases and groups. He made many efforts to promote unity within the Empire and the spread of a central "Alammaran identity", something future High Kings would struggle with for centuries, plus attempting to reduce struggles within different cultural groups and prevent conflict from spilling over into a singular large conflict.
It was now time for the economic question, and the issue of how to actually run things. Alfred established a singular currency, the coin system, one that is still in use today. He also put into place taxes based on profession and income levels, which were used to fund the central monarchy and other institutions that made up the central government of the Alammar Empire. However, these taxes were often wildly inconsistent due to the unreliable record-keeping and information gathering in provinces and towns, leading to the rise of large trade barons, estate owners, and business magnates who dominated the local industry. This issue would not be fixed for a few generations of High Kings and the problem would run rampant for years.
With the continent secured, another question came up, about the fate of the Imperial Army. While they were an undeniable factor and force in the early years of the Empire, during its formation, now they were lacking in purpose. There were no external threats for them to fight, and most internal ones had been quenched or couldn't be solved by force. The Imperial Army was now basically useless, and taking up a large amount of resources to fund and feed, for basically no reason. But dissolving it entirely would be a terrible idea, putting the Empire at the mercy of local provincial leaders to accomplish anything militarily. As such, Alfred decided to convert the Imperial Army into a sort of provincial police garrison force. It would be up to provincial governors to maintain the garrison, lessening the costs needed to run the army while also giving regional loyalty to the Army because many of their own would be enlisting into the garrison force.