The 101st Airborne Division (Air Assault) Gold Book March 2021 is a reference publication that reflects the current doctrine, organization, and capabilities of the 101st Airborne Division. It incorporates the latest tactics, techniques, procedures, and lessons learned during the last 19 years of combat operations while maintaining focus to defeat the threats of tomorrow. Significant changes in this edition include an updated doctrinal hierarchy, the clarification of AASLT planning events and requirements, refined roles and responsibilities, a streamlined air assault planning process, Gold Book nesting with emerging and current aviation doctrine, refined Cherry and Ice definitions. and updated Appendices conforming to current doctrine and identified best practices. This manual serves as the guiding document for the 101" Airborne Division to conduct platoon to brigade sized air assaults. deep into enemy territory, within 96 hours of issuing an operations order, in order to achieve objectives in support of the Joint force. The intent is that this manual exists as a living document and benefits not only the 101". but also every other division and organization in the Army and across the Joint Force.