Which of the following is NOT one of the three training domains the Army uses?

The training domains defined by the Army are institutional, operational, and self-development. The institutional domain encompasses formal training and education provided in schools and training centers, focusing on structured learning. The operational domain pertains to training conducted in units, typically involving hands-on, practical application of skills in real-world scenarios. Self-development emphasizes personal initiative in skill enhancement and knowledge acquisition outside formal training settings.

The option that is not recognized as a training domain is tactical development. While it may sound relevant to military training concepts, it does not fit within the formal structure established by the Army's training framework, which categorizes training into the three specified domains. Thus, understanding the distinctions and purposes of each of the defined training domains is essential for comprehending the overall training methodology used by the Army.