Which of the following was not a legacy of the civil war?
a. the northern economy boomed while the south's was destroyed
b. large loss of life because of advancement in military technology
c. clara barton founded the american red cross
d. first time use of trenches, machine guns, and prison camps

It is D. The "first time of trenches, machine guns, and prison camps" mostly fits with WWI

Economic success prussia had a very strong economy, partly due to the success of the zollverein. stronger prussian army king wilhelm wanted to build a bigger, stronger army but was blocked by the prussian landtag (parliament).-credits to google for putting answer -credits to slideshare for making answer-credits to me for putting answer on brain.ly