@metalslime even the Japanese knew this, to an extent. They believed that they will definitely lose a dragged-out war with the US because of its production capacity, and all their hopes were riding on the Pearl Harbour attack inflicting so much damage that the US decides not to join the war...
Back then, I didn't know that search history and nsfw filters existed, so I kept looking up stupid shit like "reproductive system" on my aunt's laptop and all I got were charts.
What would be cool is if he doesn't use guns or gas, and instead the tech "asspull" he uses is something wacky like when Archimedes supposedly built shit like a giant claw to grab and drop ships or a giant mirror to reflect sunlight and burn ships when the Romans were trying to invade Syracuse...