Intelligence - Army Field Manual FM 2-0 Author:U.S. Army FM 2-0 is the Army?s keystone manual for military intelligence (MI) doctrine. It describes: The fundamentals of intelligence operations, the operational environment (OE), Intelligence in unified action, the Intelligence Battlefield Operating System (BOS), Intelligence considerations in strategic readiness, the intelligence process, MI roles an... more »d functions within the context of Army operations.« less