This manual provides engineer doctrine for operating at the BCT level and below and within the framework of unified land operations. The engineer support doctrine for the BCT is focused on tactical-level maneuvers. The engineer organizations that are organic to the BCT are optimized to perform combat engineering tasks (primarily mobility with limited capabilities in countermobility and survivability). Geospatial engineering support is provided by organic terrain teams. Additional engineering support (combat and general) comes from engineer organizations that are task-organized to the BCT or that provide support from echelons above brigade (EAB) organizations. This manual is aligned with current BCT doctrine and describes engineer support for the armored BCT, infantry BCT, and Stryker BCT. Although the armored cavalry regiment and engineer company are not specifically addressed, the basic principles of this manual also apply to those organizations. This manual also provides greater detail for commanders and staffs at brigade echelons and below to ensure the synchronization of engineer capabilities across the range of military operations. Many of the tactical tasks associated with combat and general engineering support have remained constant although current and proposed future operational environments have dramatically shifted with the emergence of new threats (such as improvised explosive devices [IEDs]) and an increased emphasis on stability operations. Another significant change involves Army reorganization and restructuring of the force and the effects that they have on doctrine and operations. Changes that directly affect this manual include the-Restructure of engineer organizations within each of the three types of BCTs and within the armored cavalry regiment; Likelihood that the operations conducted will be with unified action partners. (The primary focus of joint engineer operations is to achieve the commander's intent by coordinating engineer support throughout the joint area of operations.); Alignment of engineer doctrine that supports BCTs; Consequential changes in the basic Army organizational structure and equipment of engineer organizations.