What is the psycology term for a self-induced completely emotionless state as used by the military special ops in espionage missions?

The psychological term for a self-induced, emotionless state often used in military special operations is "emotional detachment" or "emotional numbing." This state allows individuals to suppress their emotions to maintain focus and composure during high-stress situations, such as espionage missions. Techniques such as mindfulness, cognitive restructuring, and training in resilience can help achieve this emotional control.