continued american civil war

snake, the power difference for america is what i want, i want america to not be able to interfere in major world issues that would sprout in such a timeline. that way possibly you may see a rising by a different world power that could not be stopped from growing since america cannot fight.
 
Okay, say theoritically a continued american civil war did continue into the 20th or very late 19th century. would you see advances such as tanks, more advanced automatic + semiautomatic firearms, and possibly bi-planes-monoplanes appear earlier because of the war.
 
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