There is a powerfull necromancer somewhere in Skyrim. He killed one guard by shooting an arrow on his knee. He ressurected him pernamently, and then copied him. As guards were dieing he sent his thralls to replace them. Eventualy, after few decades, all skyrim guards are now his puppets. Fuk the Thalmor, fuk the Imperails, fuk the Stormcloacks, fuk the police. He is the one pulling the strings. He can turn whole coutry upside-down anytime he wants. Every1 is completly at his mercy without them realizing it.
Now, a little about necromancer. He was born during oblivion crysis. His parents went to war and never came back. His uncle escorted him to Skyrim to hide, he was six y old. Eventualy, his uncle died too, so he became obsessed with immortality. And he have acheved it!!
How?
His conjuration skills were improving gradualy, he tried to put his soul in a soul gem, but that had many errors. He was aware of them, so he developed a spell that would tear his soul in two, and trap one half inside of gem. That way, whenever came the need, he would switch rotten soul with a fresh one and expand his life span. He fed his rotten soul inside of gem with souls of animals, and made it fresh again.
This gave him enough lifetime to develop another spell. Spell to multiply dead thralls.
This, my friends, is how it all came to existance. Pretty much Dagon's fault.
I apologize if there are policemen here.it was for the athmosphere. Also, for all rough words i used.