A.N. This is my first posting in a few years, but I hope you enjoy. This is not HBP/DH compliant, but I may borrow a little bit from each book.
Prologue
The bustle of the airport did little to calm Alaina Mackenzie's nerves as she handed her boarding pass to the gate agent. The meeting she'd had the previous day had shocked her, but Colonel Thomas had insisted that she was the most highly qualified candidate for the job. He apparently owed some old geezer in the UK a few favors. She was now assigned to spend the next year or so teaching a bunch of snot-nosed brats how to defend themselves.
Alaina had graduated from Salem ten years prior, and had subsequently been recruited into the magical division of the U.S. Marines. For the past two years she had been training newbies. Alaina was known for having little tolerance for anyone who felt they were above her method, and soon found themselves booted out of her beloved Corps. Now, she was told she had to do the same thing to a bunch of kids.
Alaina jammed her headphones in as she settled comfortably in her seat, stretching her booted feet out in front of her. Within a few hours, she would arrive in London, meeting one of the other professors at the airport. Alaina smirked at the thought, wondering what kind of outlandish costume her escort would be wearing. The Brits, in general, had no clue what a normal muggle would wear, and she was looking forward to the show.