Answer:
The internal combustion engine.
Explanation:
it was powered by by externally-produced steam.
Answer: can you just look it up and if you can't i will give you the answer
it is long so please look it up first if u can like i said if u can not let me know in the comments
Explanation:
The best option from the list would be that both sides "<span>attacked industrial regions to destroy the other side’s industry," since this was the first "total war" in which nothing was technically "off limits" for attack. </span>
