What is the primary focus of military doctrine?

The primary focus of military doctrine is indeed centered on how to think, rather than what to think. This emphasis encourages military leaders and personnel to develop critical thinking skills, adapt to various situations, and apply general principles of warfare in nuanced contexts. Military doctrine serves as a foundational framework that outlines the fundamental principles and philosophies of operations. By fostering a mindset geared towards adaptability and situational awareness, doctrine prepares military personnel to face unpredictable and dynamic environments, allowing them to devise effective strategies and solutions based on sound reasoning rather than rote application of fixed rules.

The other options, while relevant to different aspects of military operations, do not capture the essence of military doctrine. Fixed rules for strategy can be limiting, as they do not account for the complexity of real-world situations. A guide for developing new military technologies is an important element of military advancement but falls under logistics and procurement, separate from the conceptual guidance that doctrine provides. Specific engagement tactics are vital in combat scenarios but are more tactical in nature, whereas doctrine encompasses broader operational and strategic perspectives.