Final answer:
The synonym of 'clandestine' is 'Undercover', as both refer to actions done in secret. Historical examples include the CIA's undercover operations, and the use of spies in warfare points out the importance of keeping certain activities hidden.
Step-by-step explanation:
The synonym of clandestine in the given context is Undercover. The word 'clandestine' refers to something that is done secretly, especially when such secrecy is meant to deceive or keep something hidden from public knowledge. For a meeting of rebels, the secrecy is paramount, and only trusted agents could attend the clandestine meeting to ensure that sensitive information remains hidden from those not authorized to know.
Examples of clandestine operations can be found in various historical contexts, such as the CIA's encouragement of Castro's opponents and its secret mission to train and arm ex-Cubans for an invasion of the island. These kinds of operations are designed to be undercover and hidden from the public and enemy forces.
Additionally, concepts such as using spies as detailed in historical texts and manuals on warfare stress the importance of secrecy. Spies could be local, inward, converted, doomed, or surviving, each serving distinct functions, all operating within the realms of clandestine activity to gather intelligence.