I love Mary Gentle's book Grunts!; basically a dimension traveling dragon has hoarded 'our world' weapons and equipment by the mountain and when it dies, it curses its hoard with 'you become what you steal'. Prompting a single small band of orcs, which steals some equipment to become 'orc-marines' to the core.
They end up changing their entire fantasy world into a fascilism of ours, but then with fantasy races, subverting every single trope into something with a modern twist. Think dwarf mechanized infantry in APC's, pegasus dive-bombers or halflings driving an armoured column.
(but in the end, world domination comes about in a rather unexpected way...)
I've always wanted to model this; could be a lot of fun, but at the time of my first reading, the only miniatures I knew were GW's, and most were metal to boot.
It strikes me that only recently, all the components have become available on the market to actually make this a reality!
The abundance of plastic kits of every variety out there will make kitbashing orc-marines or elf-GI's very easy. (and now I'm sorely temped too...

).