This report documents the two-year effort of the U.S. Army Training and Doctrine Command to develop the modernized concepts and structures for the divisions, corps, and echelons above corps that were envisioned for the Army of the late 1980s. This volume treats activities occurring between November 1979 and December 1980. During that period, final changes were made to the heavy division, developed the previous year, as TRADOC planners turned to and completed the study and design of the infantry light division, the corps, and the echelon above corps organizations. Reviewing the concepts and structures that came out of the four major Army 86 Studies, the Chief of Staff of the Army approved them in decisions of August and September 1980. Preparation of an initial plan for transition from the ROAD-based organizations of the early 1980s to those of the new 19,966-man Division 86 heavy division drew to completion in December 1980 and was published early in 1981. Corps 86 united corps battle and support organizations and concepts to facilitate concurrent operations against the enemy's assault forces and, deep behind his lines, his second echelon units. The Corps 86 concept also focused on protecting rear areas, sustaining and reconstituting combat power, and integrating the air-land battle. Echelons Above Corps 86, completed in its first phase, laid the doctrinal groundwork and structured a theater army for the NATO theater of 1986 within the context of the integrated battlefield, joint and combined operations, and a six-months buildup period. The Chief of Staff of the Army approved the EAC 86 concepts and organizations for the general design of the theater army.

Division 86: the heavy division -- Infantry division 86: the light division -- Corps 86: the heavy corps -- Echelons above corps 86 -- Appendix A: Army 86 battlefield functions -- Appendix B: division 86 organizations (August 1980) -- Appendix C: prospective light division equipment -- Appendix D: infantry division 86 organizations (September 1980) -- Corps 86 organizations (August 1980) -- Echelons above corps 86 organizations (August 1980) -- Logistics planning factors, daily consumption by class of supply -- List of acronyms and abbreviations.