Answer: The American Civil War was the first war of the modern age. The two sides used advances in communications and military technology to revolutionize the ways in which battles were fought. ... The arrival of railroads and telegraphs also changed the nature of battle.
So, the answers in order are:
A. D. D. C. D. C. C. C. B. A. A. B.
Hope this helps!
Answer:
A. It gave the thirteen colonies a focus for their sentiments against British authority.
Explanation:
