I really need help it's kinda long but not long and it's for American History.

Question

use the picture to help!!!

Based on what you learned in Lesson 17 and your own Civil War technology research, which weapon or invention was the most effective both during the war and in the long term?

(Your answer should be 7 to 10 sentences long.)
I really need help it's kinda long but not long and it's for American History.
use the picture to help!!! ill give extra points to someone that does it correctly

Based on what you learned in Lesson 17 and your own Civil War technology research, which weapon or invention was the most effective both during the war and in the long term?

(Your answer should be 7 to 10 sentences long.)

Answer 1

h t t p s :
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/5f5b40558c506b0ca18197d4dfcb39a1.
png

Answer 2

Well, despite the progress, submarines did not become popular until later.
Repeating rifles replacing muzzle loaders shooting round balls maybe ?