In General Order 2, what should a soldier always be doing while on post?

In General Order 2, the primary obligation of a soldier on post is to observe everything that occurs within their sight or hearing. This requirement is critical for maintaining security and situational awareness. By actively monitoring their surroundings, soldiers can identify potential threats, ensure the safety of their area, and respond promptly to any incidents. This vigilance helps uphold the principles of readiness and accountability that are essential in a military environment.

While the other options may represent activities that individuals might engage in during their personal time, they distract from the fundamental duty of a soldier to remain aware and alert while on duty. Engaging in music, recruitment, or leisurely reading would detract from a soldier's primary responsibilities on post, making it ineffective in fulfilling their role.