How does this excerpt develop the central idea that espionage during the civil war was often carried out but untrained citizens

It explains an ordinary person's motivation for conducting Espionage against the enemy.

Explanation:

It explains an ordinary person's motivation for conducting Espionage against the enemy.

espionage during the civil war was fieldwork that included observations, scouting, and interrogations of prisoners

scholarship is an sc because, by definition, a subject complement is the adjective, noun or pronoun that follows a linking verb, for example the verb be (in any of its forms).