What critical task is essential for guard operations?

Maintaining contact with lead elements is crucial for guard operations because it ensures situational awareness and effective communication within a unit. When guards are in operation, they are typically positioned to protect key areas or assets, which requires them to be informed about the actions and movements of the main force or supporting units. This continuous line of communication aids in the coordination of defensive strategies and allows for a swift response to any potential threats, thus enhancing overall operational effectiveness. It helps units anticipate enemy movements and respond appropriately to changes in the tactical environment, ensuring that the operation remains cohesive and effective against any threats.