This manual is a dual-Service US Army and US Marine Corps publication introducing new terms and definitions and updating existing definitions as reflected in the latest editions of Army field manuals and Marine Corps doctrinal, warfighting, and reference publications. It complies with DOD Military Standard 2525. When communicating instructions to subordinate units, commanders and staffs from company through corps should use this manual as a dictionary of operational terms and military graphics.This manual incorporates changes in joint terminology and definitions as reflected in JP 1-02 (as amended through June 2003) and provides a single standard for developing and depicting handdrawn and computer-generated military symbols for situation maps, overlays, and annotated aerial photographs for all types of military operations. The symbology chapters of this manual focus primarily on land military symbols applicable for the Army and Marine Corps. In addition to terminology, this manual includes the following updated lists:* Approved acronyms and abbreviations with their expansions.* Two-letter country codes.* Brevity codes and their meanings.* Procedural words.* Tactical tasks.This manual applies to the Active Army, the US Army Reserves, the Army National Guard and the US Marine Corps.