Book excerpt: Field Manual (FM) 5-34 provides engineer soldiers at all levels with a source of reference for doctrine; technical data; and tactics, techniques, and procedures (TTP). It also provides a source of reference for information most commonly needed by engineers. Although this manual contains some information that cannot be found in other manuals, most of the information is taken from the manuals that engineers most commonly use. FM 5-34 addresses combat operations, the threat engineer, reconnaissance operations, mobility operations, defensive operations, demolitions, bridging, roads and airfields, and rigging. The most pertinent information on these topics is included in this manual; however, for more detailed information, users of this manual should check the appropriate manuals in each subject area.