What is the last of the Five Principles of Patrolling that involves the application of sound judgment and reasoning?

The last of the Five Principles of Patrolling that highlights the application of sound judgment and reasoning is indeed Common Sense. This principle emphasizes the necessity for leaders and soldiers to make logical decisions based on their assessments of the situation at hand. While the other principles—Security, Control, and Planning—are essential components of effective patrolling, Common Sense stands apart as it integrates the understanding of these elements and applies them contextually.

By employing Common Sense, soldiers can adapt their strategies to the complexities and unpredictabilities of their environment, ensuring that they consider the welfare of their team, mission objectives, and potential risks. This principle is critical because it allows for flexibility and responsiveness, which are vital in dynamic operational situations. Essentially, Common Sense is a culmination of tactical knowledge, experience, and critical thinking, enabling personnel to act decisively and appropriately under varying circumstances.