Us Army Abbreviations and Acronyms
- ODEPOffice of the Director of Environmental Programs
- OEOrdnance Explosives
- OEA(U.S.) Office of Economic Adjustment
- OEROfficer Evaluation Report
- OFOpposing Force
- OGCOffice of the Army General Counsel
- OJAGOffice of The Judge Advocate General
- OLCOak-Leaf Cluster (signifying Subsequent Awards)
- OMBOffice of Management and Budget (U.S.)
- OOOperations Order
- OOAOn Or About
- OPFOROpposing Force
- OPFOROposing Force/s
- OPNAVChief of Naval Operations
- OPOOperations Order
- OPORDOperations Order
- OPORDEROperations Order
- OPORDER/OPORDOperations Order
- OPROffice of Primary Responsibility
- OPROffice (officer) of Primary Responsibility
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