Tag firepower

Trevor Dupuy’s Definitions of Lethality

Two U.S. Marines with a M1919A4 machine gun on Roi-Namur Island in the Marshall Islands during World War II. [Wikimedia]

It appears that discussion of the meaning of lethality, as related to the use of the term in the 2018 U.S. National Defense Strategy document, has sparked up again. It was kicked off by an interesting piece by Olivia Gerard in The Strategy Bridge last autumn, “Lethality: An Inquiry.”

Gerard credited Trevor Dupuy and his colleagues at the Historical Evaluation Research Organization (HERO) with codifying “the military appropriation of the concept” of lethality, which was defined as: “the inherent capability of a given weapon to kill personnel or make materiel ineffective in a given period, where capability includes the factors of weapon range, rate of fire, accuracy, radius of effects, and battlefield mobility.”

It is gratifying for Gerard to attribute this to Dupuy and HERO, but some clarification is needed. The definition she quoted was, in fact, one provided to HERO for the purposes of a study sponsored by the Advanced Tactics Project (AVTAC) of the U.S. Army Combat Developments Command. The 1964 study report, Historical Trends Related to Weapon Lethality, provided the starting point for Dupuy’s subsequent theorizing about combat.

In his own works, Dupuy used a simpler definition of lethality:

He also used the terms lethality and firepower interchangeably in his writings. The wording of the original 1964 AVTAC definition tracks closely with the lethality scoring methodology Dupuy and his HERO colleagues developed for the study, known as the Theoretical Lethality Index/Operational Lethality Index (TLI/OLI). The original purpose of this construct was to permit some measurement of lethality by which weapons could be compared to each other (TLI), and to each other through history (OLI). It worked well enough that he incorporated it into his combat models, the Quantified Judgement Model (QJM) and Tactical Numerical Deterministic Model (TNDM).

U.S. Army Mobile Protected Firepower (MPF) Program Update

BAE Systems has submitted its proposal to the U.S. Army to build and test the Mobile Protected Firepower (MPF) vehicle [BAE Systems/Fox News]

When we last checked in with the U.S. Army’s Mobile Protected Firepower (MPF) program—an effort to quickly field a new light tank lightweight armored vehicle with a long-range direct fire capability—Request for Proposals (RFPs) were expected by November 2017 and the first samples by April 2018. It now appears the first MPF prototypes will not be delivered before mid-2020 at the earliest.

According to a recent report by Kris Osborn on Warrior Maven, “The service expects to award two Engineering Manufacturing and Development (EMD) deals by 2019 as part of an initial step to building prototypes from multiple vendors, service officials said. Army statement said initial prototypes are expected within 14 months of a contract award.”

Part of the delay appears to stem from uncertainty about requirements. As Osborn reported, “For the Army, the [MPF} effort involves what could be described as a dual-pronged acquisition strategy in that it seeks to leverage currently available or fast emerging technology while engineering the vehicle with an architecture such that it can integrate new weapons and systems as they emerge over time.”

Among the technologies the Army will seek to integrate into the MPF are a lightweight, heavy caliber main gun, lightweight armor composites, active protection systems, a new generation of higher-resolution targeting sensors, greater computer automation, and artificial intelligence.

Osborn noted that

the Army’s Communications Electronics Research, Development and Engineering Center (CERDEC) is already building prototype sensors – with this in mind. In particular, this early work is part of a longer-range effort to inform the Army’s emerging Next-Generation Combat Vehicle (NGCV). The NGCV, expected to become an entire fleet of armored vehicles, is now being explored as something to emerge in the late 2020s or early 2030s.

These evolving requirements are already impacting the Army’s approach to fielding MPF. It originally intended to “do acquisition differently to deliver capability quickly.” MPF program director Major General David Bassett declared in October 2017, “We expect to be delivering prototypes off of that program effort within 15 months of contract award…and getting it in the hands of an evaluation unit six months after that — rapid!“

It is now clear the Army won’t be meeting that schedule after all. Stay tuned.

The Historical Combat Effectiveness of Lighter-Weight Armored Forces

A Stryker Infantry Carrier Vehicle-Dragoon fires 30 mm rounds during a live-fire demonstration at Aberdeen Proving Ground, Md., Aug. 16, 2017. Soldiers with 2nd Cavalry Regiment spent six weeks at Aberdeen testing and training on the new Stryker vehicle and a remote Javelin system, which are expected to head to Germany early next year for additional user testing. (Photo Credit: Sean Kimmons)

In 2001, The Dupuy Institute conducted a study for the U.S. Army Center for Army Analysis (CAA) on the historical effectiveness of lighter-weight armored forces. At the time, the Army had developed a requirement for an Interim Armored Vehicle (IAV), lighter and more deployable than existing M1 Abrams Main Battle Tank and the M2 Bradley Infantry Fighting Vehicle, to form the backbone of the future “Objective Force.” This program would result in development of the Stryker Infantry Fighting Vehicle.

CAA initiated the TDI study at the request of Walter W. “Don” Hollis, then the Deputy Undersecretary of the Army for Operations Research (a position that was eliminated in 2006.) TDI completed and submitted “The Historical Combat Effectiveness of Lighter-Weight Armored Forces” to CAA in August 2001. It examined the effectiveness of light and medium-weight armored forces in six scenarios:

  • Conventional conflicts against an armor supported or armor heavy force.
  • Emergency insertions against an armor supported or armor heavy force.
  • Conventional conflict against a primarily infantry force (as one might encounter in sub-Saharan Africa).
  • Emergency insertion against a primarily infantry force.
  • A small to medium insurgency (includes an insurgency that develops during a peacekeeping operation).
  • A peacekeeping operation or similar Operation Other Than War (OOTW) that has some potential for violence.

The historical data the study drew upon came from 146 cases of small-scale contingency operations; U.S. involvement in Vietnam; German counterinsurgency operations in the Balkans, 1941-1945; the Philippines Campaign, 1941-42; the Normandy Campaign, 1944; the Korean War 1950-51; the Persian Gulf War, 1990-91; and U.S. and European experiences with light and medium-weight armor in World War II.

The major conclusions of the study were:

Small Scale Contingency Operations (SSCOs)

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. It would appear that existing systems (M-2 and M-3 Bradley and M-113) can fulfill most requirements. Current plans to develop an advanced LAV-type vehicle may cover almost all other shortfalls. Mine protection is a design feature that should be emphasized.
  2. Implications for the Interim Brigade Combat Team (IBCT). The need for armor in SSCOs that are not conventional or closely conventional in nature is limited and rarely approaches the requirements of a brigade-size armored force.

Insurgencies

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. It would appear that existing systems (M-2 and M-3 Bradley and M-113) can fulfill most requirements. The armor threat in insurgencies is very limited until the later stages if the conflict transitions to conventional war. In either case, mine protection is a design feature that may be critical.
  2. Implications for the Interim Brigade Combat Team (IBCT). It is the nature of insurgencies that rapid deployment of armor is not essential. The armor threat in insurgencies is very limited until the later stages if the conflict transitions to a conventional war and rarely approaches the requirements of a brigade-size armored force.

Conventional Warfare

Conventional Conflict Against An Armor Supported Or Armor Heavy Force

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. It may be expected that opposing heavy armor in a conventional armor versus armor engagement could significantly overmatch the IAV. In this case the primary requirement would be for a weapon system that would allow the IAV to defeat the enemy armor before it could engage the IAV.
  2. Implications for the Interim Brigade Combat Team (IBCT). The IBCT could substitute as an armored cavalry force in such a scenario.

Conventional Conflict Against A Primarily Infantry Force

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. This appears to be little different from those conclusions found for the use of armor in SSCOs and Insurgencies.
  2. Implications for the Interim Brigade Combat Team (IBCT). The lack of a major armor threat will make the presence of armor useful.

Emergency Insertion Against An Armor Supported Or Armor Heavy Force

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. It appears that the IAV may be of great use in an emergency insertion. However, the caveat regarding the threat of being overmatched by conventional heavy armor mentioned above should not be ignored. In this case the primary requirement would be for a weapon system that would allow the IAV to defeat the enemy armor before it could engage the IAV.
  2. Implications for the Interim Brigade Combat Team (IBCT). Although the theoretical utility of the IBCT in this scenario may be great it should be noted that The Dupuy Institute was only able to find one comparable case of such a deployment which resulted in actual conflict in US military history in the last 60 years (Korea, 1950). In this case the effect of pushing forward light tanks into the face of heavier enemy tanks was marginal.

Emergency Insertion Against A Primarily Infantry Force

  1. Implications for the Interim Armored Vehicle (IAV) Family of Vehicles. The lack of a major armor threat in this scenario will make the presence of any armor useful. However, The Dupuy Institute was unable to identify the existence of any such cases in the historical record.
  2. Implications for the Interim Brigade Combat Team (IBCT). The lack of a major armor threat will make the presence of any armor useful. However, The Dupuy Institute was unable to identify the existence of any such cases in the historical record.

Other Conclusions

Wheeled Vehicles

  1. There is little historical evidence one way or the other establishing whether wheels or tracks are the preferable feature of AFVs.

Vehicle Design

  1. In SSCOs access to a large-caliber main gun was useful for demolishing obstacles and buildings. This capability is not unique and could be replaced by AT missiles armed CFVs, IFVs and APCs.
  2. Any new lighter tank-like vehicle should make its gun system the highest priority, armor secondary and mobility and maneuverability tertiary.
  3. Mine protection should be emphasized. Mines were a major threat to all types of armor in many scenarios. In many SSCOs it was the major cause of armored vehicle losses.
  4. The robust carrying capacity offered by an APC over a tank is an advantage during many SSCOs.

Terrain Issues

  1. The use of armor in urban fighting, even in SSCOs, is still limited. The threat to armor from other armor in urban terrain during SSCOs is almost nonexistent. Most urban warfare armor needs, where armor basically serves as a support weapon, can be met with light armor (CFVs, IFVs, and APCs).
  2. Vehicle weight is sometimes a limiting factor in less developed areas. In all cases where this was a problem, there was not a corresponding armor threat. As such, in almost all cases, the missions and tasks of a tank can be fulfilled with other light armor (CFVs, IFVs, or APCs).
  3. The primary terrain problem is rivers and flooded areas. It would appear that in difficult terrain, especially heavily forested terrain (areas with lots of rainfall, like jungles), a robust river crossing capability is required.

Operational Factors

  1. Emergency insertions and delaying actions sometimes appear to be a good way to lose lots of armor for limited gain. This tends to come about due to terrain problems, enemy infiltration and bypassing, and the general confusion prevalent in such operations. The Army should be careful not to piecemeal assets when inserting valuable armor resources into a ‘hot’ situation. In many cases holding back and massing the armor for defense or counter-attack may be the better option.
  2. Transportability limitations have not been a major factor in the past for determining whether lighter or heavier armor were sent into a SSCO or a combat environment.

Casualty Sensitivity

  1. In a SSCO or insurgency, in most cases the weight and armor of the AFVs is not critical. As such, one would not expect any significant changes in losses regardless of the type of AFV used (MBT, medium-weight armor, or light armor). However, the perception that US forces are not equipped with the best-protected vehicle may cause some domestic political problems. The US government is very casualty sensitive during SSCOs. Furthermore, the current US main battle tank particularly impressive, and may help provide some additional intimidation in SSCOs.
  2. In any emergency insertion scenario or conventional war scenario, the use of lighter armor could result in higher US casualties and lesser combat effectiveness. This will certainly cause some domestic political problems and may impact army morale. However by the same token, light infantry forces, unsupported by easily deployable armor could present a worse situation.

U.S. Army Solicits Proposals For Mobile Protected Firepower (MPF) Light Tank

The U.S. Army’s late and apparently lamented M551 Sheridan light tank. [U.S. Department of the Army/Wikipedia]

The U.S. Army recently announced that it will begin soliciting Requests for Proposal (RFP) in November to produce a new lightweight armored vehicle for its Mobile Protected Firepower (MPF) program. MPF is intended to field a company of vehicles for each Army Infantry Brigade Combat Team to provide them with “a long-range direct-fire capability for forcible entry and breaching operations.”

The Army also plans to field the new vehicle quickly. It is dispensing with the usual two-to-three year technology development phase, and will ask for delivery of the first sample vehicles by April 2018, one month after the RFP phase is scheduled to end. This will invariably favor proposals using existing off-the-shelf vehicle designs and “mature technology.”

The Army apparently will also accept RFPs with turret-mounted 105mm main guns, at least initially. According to previous MFP parameters, acceptable designs will eventually need to be able to accommodate 120mm guns.

I have observed in the past that the MPF is the result of the Army’s concerns that its light infantry may be deprived of direct fire support on anti-access/area denial (A2/AD) battlefields. Track-mounted, large caliber direct fire guns dedicated to infantry support are something of a doctrinal throwback to the assault guns of World War II, however.

There was a noted tendency during World War II to use anything on the battlefield that resembled a tank as a main battle tank, with unhappy results for the not-main battle tanks. As a consequence, assault guns, tank destroyers, and light tanks became evolutionary dead-ends in the development of post-World War II armored doctrine (the late M551 Sheridan, retired without replacement in 1996, notwithstanding). [For more on the historical background, see The Dupuy Institute, “The Historical Effectiveness of Lighter-Weight Armored Forces,” August 2001.]

The Army has been reluctant to refer to MPF as a light tank, but as David Dopp, the MPF Program Manager admitted, “I don’t want to say it’s a light tank, but it’s kind of like a light tank.” He went on to say that “It’s not going toe to toe with a tank…It’s for the infantry. It goes where the infantry goes — it breaks through bunkers, it works through targets that the infantry can’t get through.”

Major General David Bassett, program executive officer for the Army’s Ground Combat Systems concurred. It will be a tracked vehicle with substantial armor protection, Bassett said, “but certainly not what you’d see on a main battle tank.”

It will be interesting to see what the RFPs have to offer.

Previous TDI commentaries on the MPF Program:

https://dupuyinstitute.org/2016/10/19/back-to-the-future-the-mobile-protected-firepower-mpf-program/

https://dupuyinstitute.org/2017/03/21/u-s-army-moving-forward-with-mobile-protected-firepower-mpf-program/

Back to the Future

The opening sentence of an article by Dan Goure caught my attention: “Every decade of so since the 1960s, the U.S. Army creates a requirement for what can nominally be described as a light tank.” The article is here: http://nationalinterest.org/blog/the-buzz/its-back-the-future-mobile-protected-firepower-20539?page=show

It reminds me of a meeting we had in late 2000 with Walt Hollis, Deputy Under Secretary of the Army (Operations Research). He started the meeting by telling us that something like “Every now and then, someone seems to want to bring back the light tank.” He then went on to explain that these requirements are being pushed from the top (meaning by the Chief of Staff of the Army) and they should probably have a study done on the subject. He then asked us to do such an effort.

We did and it is here: http://www.dupuyinstitute.org/pdf/mwa-2lightarmor.pdf

We decided to examine the effectiveness of lighter-weight armor based upon real-world experience in six possible scenarios:

  1. Conventional conflicts against an armor supported or armor heavy force.
  2. Emergency insertions against an armor support or armor heavy force.
  3. Conventional conflict against a primarily infantry force (as one might encounter in sub-Saharan Africa).
  4. Emergency insertion against a primarily infantry force.
  5. A small to medium insurgency (includes an insurgency that develops during a peacekeeping operation).
  6. A peacekeeping operation or similar Operation Other Than War (OOTW) that has some potential for violence.

Anyhow, I am not going to summarize the report here as that would take too long. I did draft up a chapter on it for inclusion in War by Numbers, but decided to leave it out as it did not fit into the “theory testing” theme of the book. Instead, I am holding it for one of my next books, Future American Wars.

The interesting aspect of the report is that we were at a meeting in 2001 at an Army OR outfit that was reviewing our report, and they told us that the main point of action they drew from the report was that we needed to make sure our armor vehicles were better protected against mines. As our report looked at the type of tank losses being suffered in the insurgencies and OOTWs, there were a lot of vehicles being lost to mines. Apparently they had not fully realized this (and Iraq did not occur until 2003).

Back To The Future: The Mobile Protected Firepower (MPF) Program

The MPF's historical antecedent: the German Army's 7.5 cm leichtes Infanteriegeschütz.
The MPF’s historical antecedent: the German Army’s 7.5 cm leichtes Infanteriegeschütz.

Historically, one of the challenges of modern combat has been in providing responsive, on-call, direct fire support for infantry. The U.S. armed forces have traditionally excelled in providing fire support for their ground combat maneuver elements, but recent changes have apparently caused concern that this will continue to be the case in the future.

Case in point is the U.S. Army’s Mobile Protected Firepower (MPF) program. The MPF seems to reflect concern by the U.S. Army that future combat environments will inhibit the capabilities of heavy artillery and air support systems tasked with providing fire support for infantry units. As Breaking Defense describes it,

“Our near-peers have sought to catch up with us,” said Fort Benning commander Maj. Gen. Eric Wesley, using Pentagon code for China and Russia. These sophisticated nation-states — and countries buying their hardware, like Iran — are developing so-called Anti-Access/Area Denial (A2/AD): layered defenses of long-range sensors and missiles to keep US airpower and ships at a distance (anti-access), plus anti-tank weapons, mines, and roadside bombs to decimate ground troops who get close (area denial).

The Army’s Maneuver Center of Excellence at Ft. Benning, Georgia is the proponent for development of a new lightly-armored, tracked vehicle mounting a 105mm or 120mm gun. According to the National Interest, the goal of the MPF program is

… to provide a company of vehicles—which the Army adamantly does not want to refer to as light tanks—to brigades from the 82nd Airborne Division or 10th Mountain Division that can provide heavy fire support to those infantry units. The new vehicle, which is scheduled to enter into full-scale engineering and manufacturing development in 2019—with fielding tentatively scheduled for around 2022—would be similar in concept to the M551 Sheridan light tank. The Sheridan used to be operated the Army’s airborne units unit until 1996, but was retired without replacement. (Emphasis added)

As Chris recently pointed out, General Dynamics Land Systems has developed a prototype it calls the Griffin. BAE Systems has also pitched its XM8 Armored Gun System, developed in the 1990s.

The development of a dedicated, direct fire support weapon for line infantry can be seen as something of an anachronism. During World War I, German infantrymen sought alternatives to relying on heavy artillery support that was under the control of higher headquarters and often slow or unresponsive to tactical situations on the battlefield. They developed an expedient called the “infantry gun” (Infanteriegeschütz) by stripping down captured Russian 76.2mm field guns for direct use against enemy infantry, fortifications, and machine guns. Other armies imitated the Germans, but between the wars, the German Army was only one to develop 75mm and 150mm wheeled guns of its own dedicated specifically to infantry combat support.

The Germans were also the first to develop versions mounted on tracked, armored chassis, called “assault guns” (Sturmgeschütz). During World War II, the Germans often pressed their lightly armored assault guns into duty as ersatz tanks to compensate for insufficient numbers of actual tanks. (The apparently irresistible lure to use anything that looks like a tank as a tank also afflicted the World War II U.S. tank destroyer as well, yielding results that dissatisfied all concerned.)

Other armies again copied the Germans during the war, but the assault gun concept was largely abandoned afterward. Both the U.S. and the Soviet Union developed vehicles intended to provide gunfire support for airborne infantry, but these were more aptly described as light tanks. The U.S. Army’s last light tank, the M551 Sheridan, was retired in 1996 and not replaced.

It appears that the development of new technology is leading the U.S. Army back to old ideas. Just don’t call them light tanks.