• October 7, 2020

Chapter 2. COUNTERMOBILITY FUNDAMENTALS. This chapter provides a standard classification and a detailed discussion of existing and reinforcing. Full text of “FM Countermobility” Countermobility support is divided into mine warfare and obstacle development, each with an ultimate goal of delaying, . FM Headquarters Department of the Army Washington, DC, 14 March C O U N T E R M O B I L I T Y. he foundation for engineer doctrine in .

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Commencing with initial site preparation and continuing through the conduct of the crossing, engineer elements are responsible for protecting the site, equipment, and combined arms teams from floating mines countermlbility enemy raids.

Road and bridge groups improve initial lanes through minefield, prepare banks for bridging equipment, and emplace bridges. To maintain surprise, especially at night or when the threat wishes to make a gap in their own minefields. Scatterable mines permit rapid mining anywhere in the battle area, confronting the attacker with a completely new situation almost instantly.

The advice of engineers should be secured before planning destruction by burning. 5-120 basic purposes are to delay or stop the enemy, cause his forces to bunch up and provide good targets, and force him to use up breaching assets such as bridging and earthmoving equipment.

Normally, tactical targets of interest to a tactical commander in mission accomplishment are included in the obstacle plans of division, corps, and field army, unless restricted counternobility specific orders or policies of higher commanders.

Countermobility on the Battlefield

The commander’s action includes movement, maneuver, and weapons siting to destroy the enemy. Obstacles are cleared by engineers using explosives, while plow and roller-equipped tanks clear lanes, through the minefield.

Another reason for using a greater number of less elaborate obstacles is that each one forces the enemy to expose his limited counterobstacle equipment and troops to loss. For example, the denial of major airfields, bridges, or bulk POL, when tactically essential to the enemy, takes counttermobility over the denial of major industrial facilities.


The following sequence should be used to develop such an obstacle plan. The kit is self-contained and consists of a shaped charge, a firing device, a pound cratering charge, rocket motor, tripod, and demolition circuit.

The potential of expedient obstacles is almost unlimited. They offer a reduction in logistical requirements due to reduced bulk and weight. Breaching and clearing mines. Tree blowdown during nuclear attack will present significant mobility problems. Specifically identifies each obstacle in the division obstacle system to include: These features are variable in effectiveness as obstacles. Preconstructed obstacles are obstacles that are prepared in peacetime for rapid execution once hostilities begin.

The location of friendly forces and future plans of the command are prime factors. The tactical commander and the engineer site the weapons and obstacles which offer the best relative advantage, and consider terrain configuration and the effective weapons range. Ultimate success on the battlefield will depend on mobility and countermobility efforts, not only near the forward line of own troops PLOTbut also in rear areas.

The ability to evaluate terrain and properly assess its obstacle value provides a significant advantage to the commander who does it well. Limitations on, and conditions for, the destruction of facilities of strategic importance such as locks, dams, major bridges, and tunnels. A grader can also be used to shape and smooth the berm which will reduce scraper-operator fatigue. Artillery, in particular, plays a major role in suppressing defensive fires and allowing the execution of engineer tasks.

Contaminants also can render an item temporarily unusable; however, items can be decontaminated. The combination of soft or slippery soils, and even slight slopes, will stop many vehicles. In mountainous areas, the steep slopes commonly make cross-country vehicular movement either difficult or impossible. These are large concrete blocks suspended above or beside the roadway.


FM 5-102 Countermobility

The obstacle value of a cultural feature coungermobility on its size or extent, location, and construction. The M kit comes complete with explosive. Each steel I-beam post is equipped with locking devices which prohibit the enemy from pulling them out of the shafts.

Closely spaced trees much smaller than 25 centimeters 10 inches in diameter will stop a tank even on level ground.

Full text of “FM Countermobility”

Threat offensive operations are predicated upon high speed execution and the sequenced arrival and departure of combined arms teams at specific locations at designated times. What terrain will provide a significant advantage to the one who controls it? Engineer elements are also combined with other branch elements in operational groupings to perform specific tasks.

Countermobility counteemobility is not secluded; rather, it balances with the other major battlefield missions of mobility and survivability, as well as general engineering and topography. On approaches to water obstacles and water mines. The enemy side row will always contain one less borehole than the row on the friendly side.

Such destruction could be highly effective, however, if friendly forces were seeking to divert the enemy along that bypass route. Other effects, although not necessarily obstacle effects, also must be considered. Obstacles can countermobilkty or destroy follow-on echelons. Counterobility sorts of nonstandard log obstacles can be built.