Which of the following is NOT one of the principals of war?

The concept of "principles of war" serves as a guiding framework for military strategy and operational design. Among the recognized principles are unity of command, economy of forces, and surprise, all of which are fundamental in ensuring the effective employment of military resources and achieving success in conflict.

Unity of command emphasizes the necessity for a singular authority to exercise control over military forces to ensure coherent and effective operations. Economy of forces refers to the efficient allocation and utilization of resources to achieve the best possible outcome with available assets. Surprise involves gaining an advantage over the enemy by executing operations in a manner they do not anticipate or cannot respond to effectively.

"Fortification," however, is a specific tactical measure relating to the construction of defensive structures and does not qualify as a principle of war. While fortifications can be important in certain contexts, they do not embody the overarching strategies that guide military operations like the other principles mentioned. Therefore, identifying fortification as not being a principle of war aligns with an understanding of strategic military doctrine and the essential frameworks that facilitate successful planning and execution in combat scenarios.