FM 3-34 — Engineer Operations
FM 3-34 governs Army engineer operations, capabilities, planning, organizations, sustainment, and support to Army and joint forces.
- Publication number: FM 3-34
- Title: ENGINEER OPERATIONS
- Date: 12/15/2025
- Proponent: T2COM
- Status: ACTIVE
View FM 3-34 on armypubs.army.mil
It explains the Engineer Regiment, its disciplines, organizations, lines of support, operational contexts, and planning processes. It requires engineers to integrate sustainment with plans, anticipate support requirements, and coordinate engineer capabilities across operations.
Applies to: FM 3-34 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
- Army engineer disciplines
- Engineer support to operations
- Operational environment
- Engineer organizations and capabilities
- Engineer planning
- Facilities and construction planning
- Sustainment considerations
- Defense support of civil authorities
Questions and answers
What environmental guidance must commanders integrate into operations?
To address these challenges, commanders should integrate environmental guidance into OPLANs and OPORDs, and commanders should integrate environmental considerations into training, unit activities and daily operations, intelligence preparation of the operational environment (IPOE) and risk management, and planning and execution processes. (paragraph 1-95)
Can all engineer systems be used in urban or restrictive terrain?
Not all engineer systems can be used in an urban environment or restrictive terrain, such as a subterranean condition, with the emphasis on limiting collateral damage. (paragraph 1-96)
What must engineers do about sustainment in engineer plans?
Engineers integrate sustainment with engineer plans. (paragraph 7-2)
When must engineer planners evaluate sustainment significance?
Engineer planners evaluate the sustainment significance of each phase of the operation during the entire planning process. (paragraph 7-2)
When must engineers forecast Class IV and V supply requirements?
As early as possible, engineers forecast requirements for Class IV and V supplies (and the transportation and material-handling support needed to move them) and initiate actions to acquire and place them where they will be needed. (paragraph 7-3)