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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There are two types of demolition obstacles, preliminary and reserved.

Reconnoiters march route, clears obstructions, and selects column route. If the enemy could force his way through the existing obstacle in the immediate vicinity in 10 minutes, it would be wasteful to construct a reinforcing obstacle requiring 40 minutes to breach.

Combat engineer units at any level are of two general types: This phase of engineer operations also marks the arrival of major combined arms teams, and is usually supported by artillery fires.

A worst case example would be for air assets to prematurely destroy a bridge that would be a major avenue of approach for a ground counterattack. Engineers assist in fitting these and plow-roller combinations KMT-5s commonly used for minefield reconnaissance.

FM 5-102 Countermobility

Hasty crossing The hasty crossing incorporates the rm of rapid movement previously mentioned. Assist ground movement by USAF elements such as radar and logistic elements. Using obstacles so as to obtain surprise is one means available to the commander to retain a degree of initiative even when defending.

Since TOWs have a greater maximum effective range than Threat tanks, it is to our distinct advantage to site part of the tactical obstacle system to capitalize on that difference.

FM Countermobility – Chptr 6 Obstacles Other Than Minefields

The operator of the machinery or a technician is the best source of advice on rapid destruction methods of machinery items. Crossing preparation and execution Following the initial site preparation, and immediately prior to actual crossing, final preparatory activities are executed.


Artillery, in particular, plays a major role in suppressing defensive counter,obility and allowing the execution of engineer tasks. In general, the faster the desired rate of advance, the stronger the OOD. Terrain is not just the field where the battle is fought–it is very much a part of the battle itself.

The purpose of any obstacle or system of obstacles is to control enemy movement. Analysis of the mission is a critical item in planning obstacles.

Reinforcing obstacles which complement the existing obstacle value of the terrain, and are designed and emplaced to support the maneuver plan, are an effective “combat multiplier. A division will usually counternobility a river on a wide front at a minimum of four points sometimes up to eight simultaneously, seeking to find suitable areas for each type of crossing means. The forward end section is fitted with a roller to facilitate insertion of the charge into a minefield. Triangular ditches in sand must be greater than 1.

They are used to facilitate the placement coyntermobility cutting charges and to insure their secure attachment. Employment of nuclear, biological, and chemical NBC weapons will create anew experience and add new dimensions to the environmental conditions. Each linear charge may be assembled to any desired length by connecting 2-meter sections together with threaded collars.

There is a reasonably fine line that distinguishes denial operations from obstacle emplacement. Each time the Allies attempted to capture Rhine River bridge, the Germans methodically and efficiently destroyed it.

The number of lanes to be cleared depends on the terrain and the number of columns in the assault echelon.

FM – Countermobility

Corps and division obstacle plans, as well as denial plans, must consider this effect. Bangalore torpedoes are also used. Areas can be denied to the enemy; however, the countermobilkty of the denial period may vary widely depending upon the type of denial method used and enemy capability and desire.

In the latter role, engineers insure that the crossing is conducted at a high rate of speed, a requirement considered to be extremely important. Artillery, in particular, plays a major role in suppressing defensive fires and allowing the execution of engineer tasks. Although all threat troops are trained in the fundamentals of mine warfare, combat engineers are specially trained to perform this function. This equipment is particularly useful during an assault river crossing when there tm minefield on the far bank and amphibious vehicles may have to initially operate in the bridgehead without tank support.


Topographic units provide a variety of countermobiliyt including cross-country movement maps, overprinted maps, and various scale tactical maps. Embankments more than 3 meters 10 feet high with side slopes greater than 45 percent can be serious obstacles. The natural obstacle value of built-up areas can be readily reinforced, and those properly located to control approaches or key terrain can be developed into formidable strongpoints.

These features are variable in effectiveness as obstacles. The M demolition cratering countetmobility is specially designed to produce craters in all types of soil and road surfaces, to include reinforced concrete. Tm reinforcement techniques must be employed along the depth of the enemy’s formation and avenues of approach where existing terrain places him at the greatest disadvantage.

Countermobility on the Battlefield

As nuisance minefield along or on routes, especially around craters and demolitions, to allow the route clearing unit to work freely. At best, however, slope can be determined on only a small portion of the area by this procedure. In supporting the offense, engineers employ extensive minefield in several situations such as Other obstacles are used to separate the enemy’s leading elements from reserves or following echelons, thus precluding reinforcement. Large lakes make excellent obstacles.

Banks made up of fine-grained soils may fail under repeated countermkbility.