When the dead rose initially there was panic and chaos. The dead just attacked and pursued, but it was nothing more than just zombies mostly. Most adventures had experiences with such things and were able to explain how to defend and destroy. This worked despite the problem did not get better. The dead still kept getting up. All dead. Those buried those who died at all, and those who were bitten by the zombies. After a few weeks, the zombies began to become organized. They began to fall into phalanx formations and would systematically attack towns. There was no evidence of anyone leading them. Eventually proverbially battle lines were drawn and The Dead War started. Despite how things started, other undead began to appear. Ghouls, wights, morgh, and things that had no names. All were wearing armor, some bearing weapons, and there were others who seemed intelligent and in the role of commanders. They proved to be the undoing. They were not just intelligent they were smart and expert tacticians. The living made its mistake thinking it would just wipe out a few thousand zombies. They were very wrong. The fight ended when the living was outnumbered 40 to one. The commanders order the living to lay down arms. They were then bound and hauled away to newly rebuilt prisons and left there to rot. Meanwhile, the world moved on. Undeath became a thing that just was. More and more intelligent undead began to appear and took on more roles like officers in the military. Eventually the undead began to call itself The Occupation. They occupy major cities and towns, and smaller less significant ones may have a representative or two to monitor activities and to make sure everyone is working. People farm and work for the preservation of other people. They are given meager wages by The Occupation which they practically take right back with monthly taxation.