I'd love to simply land myself on any steppe nomads, and create gunpowders and teaching them how to fight with guns and muskets. Well, the nomads are naturally better missile fighters, so I'd expect I could conquer the wolrd in 10 years with my "nomadic dragoon" army.

But I'd also love to land in Athens, and write several scrolls about Chemistry, Physics, and Biology, as well as maybe math...

Oh yeah, to create nitroglyverins, you'll just need a bunch of animal fat, boil them with ash, add some ammount of salts and then you harvest the thick liquid on the bottom, yeah, glycerine.

And about the nitrates, I'll go the nearby saltpeter deposits, and a big jar of redistilled vinegar is more than enough to made nitric acid. BUt hey... I'll start to taught them (either nomads or hellenes) how to create a good fertilizers first, and then made solar cells instead of oil based engines.



And at least, when I got bored, I'll just go to Barbaropolis with my dragoons and start shooting them. And yeah.... create a large, 5 meter deep, 20 meters square pit when a lot of Romaioi barbaroi thrown naked and free to run inside, while they become a moving target practice.