This includes high-stakes actions like breaching obstacles and gap crossing (such as crossing rivers or ravines) to allow combat forces to engage the enemy.
As of , a new version of ATP 3-90.4 was released, totaling approximately 316 pages. Recent doctrine announcements in 2025 have noted specific terminology shifts; for instance, the term "covert" (formerly used for "covert breaching" or "covert crossing") is being replaced by the term "clandestine" to better align with legal and military definitions. How to Access the ATP 3-90.4 PDF
The overarching framework for ensuring forces can move freely where and when needed. atp 3-90.4 pdf
Specific support for creating and maintaining landing zones and forward airfields. Recent Updates and Terminology Changes
These are supporting tasks like clearing routes, constructing and maintaining combat roads, and building forward airfields or landing zones. How to Access the ATP 3-90
You can search for the manual on the Official Army Publishing Directorate site. Note that some versions may have distribution restrictions (such as "Distribution Statement C"), limiting access to U.S. Government agencies and contractors.
The publication is a joint effort, serving both the and the U.S. Marine Corps . Key Chapters and Content You can search for the manual on the
Methods for removing obstacles or hazards from routes and areas to allow safe passage.
Official copies of this and other Army publications are managed by the .