What term describes protection from enemy observation and surveillance?

The term that describes protection from enemy observation and surveillance is concealment. Concealment refers specifically to the use of various methods and techniques to hide personnel, equipment, or activities from the view of the enemy. This could involve the use of natural terrain, foliage, or other means to effectively obscure what is present, ensuring that the enemy cannot see or detect forces or materials that could compromise operational security.

In a tactical context, concealment is critical for maintaining the element of surprise and safeguarding against enemy reconnaissance efforts. It differs from cover, which provides physical protection against enemy fire rather than solely hiding from observation. Camouflage is related in that it helps blend objects into their environment to prevent detection, but concealment more broadly encompasses the strategies and tactics employed to remain unseen. Fortification, on the other hand, involves the construction of defensive structures and is focused on creating physical barriers against attacks rather than specifically masking movement or presence from view.