FM 1-02.1 — Operational Terms
FM 1-02.1 governs approved Army doctrinal terminology, including military terms, acronyms, abbreviations, and geographical entity codes.
- Publication number: FM 1-02.1
- Title: OPERATIONAL TERMS
- Date: 05/30/2026
- Proponent: T2COM
- Status: ACTIVE
View FM 1-02.1 on armypubs.army.mil
It compiles Army, joint, and NATO terms and definitions used in Army doctrinal publications. It also lists approved shortened forms and country codes, with proponent publications cited for terminology entries.
Applies to: FM 1-02.1 applies to the Active Army, Army National Guard/Army National Guard of the United States, and United States Army Reserve unless otherwise stated.
Topics covered
- Military terms and definitions
- Army doctrinal terminology
- Joint and NATO terms
- Acronyms and abbreviations
- Geographical entity codes
- Army Dictionary online
Questions and answers
How should commanders and staffs use FM 1-02.1 when communicating instructions?
When communicating instructions to subordinate units, commanders and staffs from company through corps echelons should use this publication as a dictionary of operational terms and military symbols.
What does chapter 2 present?
Chapter 2 presents acronyms, abbreviations, and country codes.
Where is the proponent publication cited for each term and definition?
For each term and definition, a proponent publication is cited in parentheses after the definition.