Why were there spies in the civil war?

American Civil War spies. Tactical or battlefield intelligence became very vital to both armies in the field during the American Civil War. Units of spies and scouts reported directly to the commanders of armies in the field. They provided details on troop movements and strengths.

Explanation:

answer: the third option is your answer

explanation:

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.