How do you activate a sleeper agent?

Activating a sleeper agent typically involves sending a specific signal or trigger that prompts them to realize their mission or objectives. This signal can be a coded message, a specific event, or a particular phrase that has been predetermined during their training. Once activated, the sleeper agent is expected to carry out their assigned tasks, which may involve espionage, sabotage, or other covert operations. It's crucial that the activation process is discreet to avoid detection by opposing forces.