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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They offer a reduction in logistical requirements due to reduced bulk and weight. Is the soil frozen?

Another mine-clearing device is the explosive line charge. Engineer reconnaissance, independently or in collaboration with other reconnaissance means, plays a significant role in facilitating movement. Authority and time of execution must be known. Considering delivery error associated with artillery- aircraft- and missile-delivered systems, and the inability to detonate these delivered systems at the surface or subsurface, yields in the kiloton range would be required to assure creation of the desired obstacle with any other nuclear system.

Thus, cultural feature information that may be most relevant to cross-country movement is frequently available only through over-the-ground reconnaissance or from terrain teams.

One engineer observation post OP is normally established per 2 kilometers of front in order to observe the entire enemy PLOT and ascertain the engineer action and equipment necessary to properly support the attack.

In the offense, the chief function of engineers is to assist in maintaining high rates of movement, which is the premier tactical principle of threat military doctrine. Continuous direct fire should cover the ditch and force the enemy to deploy before reaching the ditch.

When ADM or any other obstacles are emplaced, friendly forces should consider the bypass routes available and also create obstacles there or plan direct or indirect fire.

It will have a fundamental influence on an attacker’s choice of approaches, because— The anticipated rates of advance will force countermobiility attacker except the lead elements of his main body to move on roads, unless combat or imminent combat forces him to deploy into tactical formations.


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Scatterable mines are also smaller, lighter, and more lethal. In evaluating terrain for cross-country movement, 45 percent about 27 degrees is commonly used as the reasonable upper limit for tanks, and 30 percent about 17 degrees for trucks. Expedient methods of obstacle creation are limited only by imagination and ingenuity. 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.

Forested areas which have been affected by blast will be impassable to tracked and wheeled vehicles.

FM -Countermobility –

Boreholes which have been drilled or blasted through pavement and contain placed charges can also breach pavement. Limitations or restrictions on the employment of certain reinforcing obstacles such as minefield and booby traps, chemical contamination, and ADM.

Obtaining the necessary information, however, is difficult and time-consuming; and, properly evaluating trafficability strength of soils is a complicated process. Earthmoving equipment and explosives are used in preparing bridge approaches and entry and exit points at ford, ferry, and swim sites.

Engineer soils analysis personnel and qualified photo-interpreters are capable of estimating soil, strengths usually required by higher headquarters for planning purposes. A much larger yield weapon would have to be used to compensate for delivery error.

The use of scatterable minefield should be carefully planned and executed so that friendly mobility during future operations is not impeded.

They may be natural such as lakes or mountains, or they can be cultural such as towns or railroad embankments. Breaching would require extensive foundation preparation and installation of a fixed bridge. Place antitank mines in the soil and antipersonnel mines in the bottom of the ditch to discourage infantry soldiers.


In order to effectively crater a major highway with conventional explosives, a large amount of haul capacity, personnel, demolitions, and–most important–time would be required.

As the corps obstacle plan is modified or executed, continuous information will be provided by the corps to the BCE which will have the information available for TACC planning. Input to the force engineer and G-3 is especially important for obstacle planning.

Climatic influences are usually reflected in the nature countermobllity the terrain and obstacles. Where is the key terrain? The manual task of route preparation usually falls to a temporary organization called a movement support detachment, Otriad Obespecheniya Dvizheniya OOD.

As a general principle, reconnaissance will be carried out across a wide countermobillity to avoid focusing enemy attention on one area. Action which denies the accomplishment of engineer route preparation activities may create a potentially disastrous situation for the threat commander.

Countermobility on the Battlefield

The tank is the primary vehicle we want to restrict, delay, stop, and kill. Scatterable mines permit rapid mining anywhere in the battle area, confronting the attacker with a completely new situation almost instantly. They are used to facilitate countermpbility placement of cutting charges and to insure their secure attachment.

Targets must be selected with care to insure that the enemy cannot readily countrrmobility for their denial. This chapter describes the authority and responsibilities for denial operations, and identifies denial targets and methods in the overall planning process.

Short, vertical slopes or “steps” higher than 0. The primary purpose of ADM is to create obstacles. It is the countermobiluty not only of major surface relief features hills and mountainsbut also of minor relief features such as ditches, small gullies, mounds, low escarpments, small pinnacles, and sinkholes which generally do not appear on topographic maps.