Not exactly a time-travel fic. Rewritten. Can one man, taken from his home universe and thrust into an interstellar war against an unrelenting alien juggernaut find the strength and skill necessary to save his home dimension ?

When you wake up in a galaxy being manipulated by a puppetmaster into a war with no memories of who you are in a combat suit you don't know a thing about, what do you do? You do what you must. Hunt him down.

YATTF. The Butterfly Effect implies one small change in the timeline results in a complete shift in events in that universe. So what if it is even more significant than that? How big will be the change?

When Taylor and his team of cyberaugs are sent through a portal in spacetime back to October 30th 1981, what's..wait what? Their kids? And where the hell are the cyberaugs? And what the hell is magic! (Not a crossover as it is all purely in the Harry Potter universe, implying BO 1)

When a mission goes south and a 6 man 21st century special forces team land in the Mass Effect universe, what's going to happen? Especially when the team practically knows what's going to come.