“in reality we’d lose in 9 minutes”
In reality we would never know we lost—it would happen that fast.
I don’t know. Maybe they’d have the tech, but judging how we fight amongst ourselves, we’d give them a hell of a scrap.
Advanced aliens would follow the teachings of Sun Tzu—99% of their effort would be spent on battlefield preparation—the war afterwards would just be a relatively trivial formality.