Which of the following best defines reconnaissance?

• A. A plan to attack an objective.
• B. A method of chemical analysis.
• C. A weather monitoring technique.
• D. A mission undertaken to obtain information about activities and resources of an adversary through observation or detection.

Answer: (D)

Reconnaissance centers on gathering information about a target or adversary through careful observation or sensing, with the aim of reducing uncertainty before acting. The statement that a reconnaissance mission is undertaken to obtain information about activities and resources of an adversary through observation or detection captures this purpose precisely: it’s about learning what’s happening and what resources exist, not about taking action or performing analysis.

This isn’t a plan to attack, nor is it a method of chemical analysis, nor a weather monitoring technique. The other ideas describe actions or activities that do not revolve around collecting information to inform decisions. Reconnaissance provides the information foundation that helps decide next steps in planning and response.