Short Answer 
The Civil War era saw espionage primarily conducted by amateurs, relying on personal networks for intelligence. Elizabeth Van Lew emerged as a significant Union spy, motivated by her anti-slavery beliefs, and played a key role in organizing effective spy networks that enhanced Union efforts.
Step 1: Understanding the Context of Spy Work
During the Civil War era, espionage was predominantly handled by *amateurs* rather than trained professionals. This lack of formal training meant that spies often relied on their personal networks and ingenuity to gather critical intelligence. It was a time when information was a powerful tool that could influence the tide of war.
Step 2: The Role of Elizabeth Van Lew
One remarkable figure in the realm of espionage was Elizabeth Van Lew, a woman motivated by her strong opposition to *slavery*. She started her journey as a spy for the *Union* forces, driven by her convictions. Her early efforts laid the foundation for her eventual rise to a *spymaster*, where her role was pivotal in supporting Union efforts.
Step 3: Organizing Spy Networks
As her responsibilities grew, Van Lew became instrumental in establishing *organized systems* and structures for espionage operations. She created networks that allowed spies to operate more effectively and share crucial information with Union leaders. Her achievements underscore the importance of effective *organization* in successful espionage.