Which Army manual outlines the fundamentals of Air Assault operations?

The Army Air Assault Operations manual, FM 3-99, is specifically designed to provide the foundational principles and procedures related to Air Assault operations. This manual covers not only the tactics used in Air Assault missions but also the planning, execution, and assessment of such operations. It serves as an essential resource for soldiers and commanders who are involved in planning and conducting Air Assault missions, ensuring they have a comprehensive understanding of the necessary functions and capabilities.

While other manuals provide valuable information regarding different aspects of Army operations, they do not focus as specifically on Air Assault operations. For instance, FM 3-23 deals with Army aviation in a broader context, but it doesn't delve deeply into the unique dynamics and procedures of Air Assault tactics. Similarly, FM 1-02 focuses on terms and symbols, serving as a reference for definitions rather than operational guidelines. FM 7-0 is directed toward training for a range of operations but does not specifically address the Air Assault framework.

Thus, FM 3-99 stands out as the authoritative guide on Air Assault operations, making it the correct answer for this question.