Final answer:
The principle for handling each marine and determining supervision levels is based on military strategy and leadership, requiring the assessment of discipline, strength, and adaptability within the ranks.
Step-by-step explanation:
The principle that enables you to decide how to best handle each marine and determine when more supervision is needed is derived from an understanding of both military strategy and leadership. This involves assessing factors such as discipline, strength, training, consistency in reward and punishment, and the ability to modify plans according to the situation. A key aspect is knowing how to make the best of both strong and weak forces, unifying them under a single standard of courage, as reflected in the need for all ranks within an army to be animated by the same spirit. The skillful leader manages their force by being adaptable, maintaining secrecy, and ensuring order through quiet and just conduct. These principles are crucial for making informed decisions that optimize personnel management and strategic planning in a military context.