Disclaimer: Characters from the HP series are the property of J.K. Rowling, and various publishers: including but not limited to Bloomsbury, Scholastic and Warner Brothers. Neither do I own Animal Farm. No money is being made and no copyright or trademark infringement is intended by the writing of this story. This narrative is merely written for entertainment purposes, after all.
Voldermort growled in annoyance. These days there were only incompetent minions on offer. Consider Fenrir Greyback, he was fine at killing and maiming things but give him a simple task like locating an abandoned muggle farm and he failed spectacularly.
Sighing he turned his attention towards Bellatrix Lestrange, she had been more successful in finding a farm. The one she had found was named Manor Farm and had been abandoned over three years ago by its owner, a man named Jones. Something about his animals rebelling.
Chuckling at that thought, the Dark Lord motioned three dozen of his minions forward. The farm would make an excellent new Headquarters. Honestly muggles were really stupid. An animal rebellion!
Clover neighed as she saw a weird cloth near some bushes…and she went to find Benjamin.
…Benjamin groaned as he realized exactly what that cloth was covering, he hated wizards! Smirking he began planning the downfall of Napoleon. Boxer would be avenged.
"Come Death Eaters, let us conquer and destroy!" rallied Voldermort his minions.
"But Master, rumour has it there are killer animals in that farm."
"Yes and they it animals. My Lord if I am eaten I would not be able to serve you."
"Cowards," roared Voldermort. "You will do as I say. Ready! Steady! Charge!"
The army of the Dark charged.
As the Dark Army cleared the hill, they were met by the army of pink…er…by the army of pigs.
They clashed with a ferocity that shook the very ground. Three Death Eaters promptly fainted in terror and another six apparated away, but the rest fought it out with some thirty pigs.
A death eater was squashed by the fat bulk of Napoleon, who was promptly killed by the green killing curse sent his way by Bellatrix Lestrange. Lestrange was immediately decapitated by Napoleon second in command, Maximus. Maximus in turn had his throat ripped out by Greyback in wolf form. Unfortunately for Greyback he choked to death on Maximus' flesh.
Squealer seeing which way the battle was heading screamed, "Onwards Comrades, let us destroy the humans and bring honour to all animals!" and promptly ran away to hide in the stables. This saved him from what happened next…
Benjamin cackled as he saw the pigs being torn apart. Convincing Napoleon that pigs were immune to magic had been a stroke of genius. Napoleon had been so convinced in his superiority that he had actually believed him.
Benjamin nodded at one of the hens, who promptly pulled a string and the machine gun (recently bought by Napoleon from a bunch of humans) roared into life, killing all of the pigs and humans involved in the battle.
Voldermort who was not human survived and managed to apparate away.
The animals were once again free!
A week later a human named Hermione Granger arrived at Animal Farm and began negotiating for an alliance.