What does an Operational Command consist of?

An Operational Command is primarily concerned with the integration and coordination of various military forces required to achieve operational objectives. The correct choice highlights that an Operational Command consists of strategic, tactical, space, or defense forces, along with supporting flying forces. This encapsulation underscores the comprehensive nature of operational commands, which manage the deployment and execution of military operations across multiple domains.

The inclusion of strategic, tactical, and space forces recognizes the importance of versatility and adaptability in modern military operations. Each of these components plays a critical role in ensuring that the command can respond effectively to diverse scenarios, whether engaging in direct combat, conducting reconnaissance, or defending against multi-domain threats. Supporting flying forces enhance the command's capabilities through air power, which is essential to maintain dominance in various operational landscapes.

In contrast, the other choices focus on specific subsets of resources or units that are not integral to the definition of an Operational Command as a whole. For example, support forces, medical units, or training units are vital components of military operations but do not represent the comprehensive, multifaceted nature of an Operational Command that encompasses a broader range of operational forces.