the most obvious thing is that if you have a planet that has a possibility to get pelted by asteroids, why the h*ll do you have your commander on...
well all your units are robots and a nuclear EMP spreads out electromagnetic waves across a large field and fries the circuitry not disables it
what about the weather in a normal flight the weather can affect how a plane fly's like if it is flying in a desert and then a sand storm comes...
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