APDAF, you're a Goddamed idiot. Even with an AU, you could do well by sticking within the limits of technology at the time. It doesn't give you a free reign for everything. Otherwise, I'll have an AU where my WW1 nation is going to build a battleship (420 metres long!) with a wave motion gun, Lasers cannons, and X-wings on its catapults. And it will conquer the world!...
Stop, you're giving him ideas!
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"If people never did silly things nothing intelligent would ever get done." ~Ludwig Wittgenstein