text: Introduction
  engineer support. The Army engineer disciplines are the means with which the Regiment applies its
  capabilities to achieve the ends. The ways are how the capabilities, inherent in engineer formations and
  organizations, are applied to enable combat power. The ends provide freedom of action to enable engineer
  ground forces to gain, retain, and exploit the initiative to enable unified land operations. The Engineer
  Regiment consists of the three disciplines found in the operating force and USACE who conduct multiple
  engineer tasks along each line of engineer support to enable combat power and ensure freedom of action.
  Introductory figure-2. Lines of engineer support
  The Engineer Regiment exists to provide the freedom of action for land power by mitigating the effects of
  terrain in the operational environment (OE). This manual explains how (not what) to think about exploiting
  the capabilities of the Engineer Regiment in support of unified land operations. Engineer operations are
  executed through combat, general, and geospatial engineering capabilities. Each discipline focuses on
  capabilities that support, or are supported by, the other disciplines. Engineers enhance the Army’s ability to
  visualize, understand, and exploit the terrain that facilitates the lines of effort: assures mobility, enhances
  protection, enables force projection and logistics, builds partner capacity, and develops infrastructure. The
  engineer disciplines are interdependent areas of expertise formed by engineer technical capabilities and
  tactical tasks. This is true whether conducting operations at home or abroad. See introductory figure-3 for a
  logical representation of the Regiment’s contribution to Army operations.
  Based on current doctrinal changes, certain terms for which FM 3-34 is proponent have been added,
  rescinded, or modified for purposes of this publication. The glossary contains acronyms and defined terms.
  See introductory table-1 for specific term changes.
  Introductory table-1. Modified Army terms
  Term Remarks
  field force engineering Modifies the definition.