When were Spy Services created in the United States

Many Americans today would see that espionage work and spying by the United States is critical for their national security. The history of the services that have provided this, however, is more complex, and often mirrored the development and transformations that affected the US. Through its development as an independent state to one that expanded across the West, and its experiences in the Civil War and World Wars, history has shaped what spying means to the US.