Category War by Numbers

E. B. Vandiver, long serving head of CAA, has passed away

Christopher A. Lawrence
March 23, 2026

E. B. Vandiver, known to everyone as “Van”, passed away this last week at the age of 87. He became the director of the Concepts Analysis Agency in 1984. I first briefed him in 1987 when I was leading the Ardennes Campaign Simulation Data Base (ACSDB). He retired from full-time work in 2012, promoted up to being “Director Emeritus.” CAA had now become the Center for Army Analysis and had moved to its own building in Fort Belvoir.

A bio: Edgar Bishop Vandiver III (born September 19, 1938), American operations research analyst | World Biographical Encyclopedia

I gather there will be services in Fairfax, VA on Wednesday, March 25.

Obituary: Edgar Bishop Vandiver III Obituary (1938-2026) | Fairfax, VA

As he was the head of the Army’s premier analytical office for almost 30 years, he had an impact on the army and its development from the 1980s, through the collapse of the Soviet Union, through the Iraq and Afghanistan wars and after. The head of CAA started as a major general slot back in 1973. Vandiver filled that role for 28 years.

Past Directors:

MG Hal Hallgren January 1973 – February 1976
MG Ennis C. Whitehead Jr. April 1976 – May 1980
MG Edward B. Atkenson July 1980 – February 1982
Mr. David C. Hardison February 1982 – September 1984
Mr. E. B. Vandiver III September 1984 – November 2012
Dr. William Forrest Crain November 2012 – May 2020

Current Director: Dr. Steven Alexander Stoddard

Wikipeida article on CAA: Center for Army Analysis – Wikipedia

In his almost 30 years at CAA, he tended to make his impact through his management and direct conversation, as opposed to issuing papers and reports. I always found this oral history project done in 2005 to be of interest:

Military Operations Research Society (MORS) Oral History Project Interview of E.B. Vandiver, III, FS on JSTOR

Anyhow, we crossed paths a lot over the decades, although we did not know each other personally. The first major project I worked on, the ACSDB, was funded by CAA and regularly briefed to Van starting in 1987. The Kursk Data Base project I worked on was funded by CAA and was the source for four of my books (my fourth book on Kursk is coming out this fall). We were asked by him to do the Enemy Prisoner of Wars (EPW) studies and the three Urban Warfare studies among other projects. We ended up do the Iraq Casualty Estimate for him in 2004. That work is summarized in my book America’s Modern Wars. Certainly, half of my book War by Numbers was as a result of CAA funding. It was a productive relationship that lasted 22 years. Certainly his willingness to take me seriously when I first started working in this industry in 1987 and his willingness to continue taking me seriously after Trevor Dupuy passed away in 1995, went a long way in being able to do the work that I desired and in keeping The Dupuy Institute alive.

My last conversation with him was in 2009 or so as the budget was in decline and there was little funding left. I did acknowledge him in several of my books. In the end, without Vandiver at CAA, I would not have had the career I had and could not have done the explorations that I did. He tended to provide budget and let us work the projects as we best felt. He always supported the value of historical research and historical analysis. He had a very significant impact on the community.

Ardennes Campaign Simulation Data Base Combat Databases Insurgency & Counterinsurgency Kursk Kursk Data Bases Research & Analysis War by Numbers

Data for Wargames (7:00 PM Wednesday, 25 Feb.)

Christopher A. Lawrence
February 24, 2026

I will be doing a presentation tomorrow on “Data for Wargames” on the Fight Club Webinar Series 2026. The link is here: Data for Wargames with Christopher A. Lawrence.

It is a presentation developed in part from my book War by Numbers.

Historical Analysis Annual Conference War by Numbers

9 Books

Finally here is a picture of all nine of my published books. It includes two copies of The Battle for Kyiv, as one is the hardback and one is the paperback version. The paperback version does have some revisions and an expanded photo section.

We are looking to add two more books to that collection in the next six months. An additional book on the Russo-Ukrainian War should be out in the next 2 to 3 months, and The Battle of Tolstoye Woods should be out hopefully this spring. The editing process on all my books is slow, primarily because the large amount of charts, tables and tabular data in them that are a pain to edit and proof.

Two books

Christopher A. Lawrence
December 31, 2025

These two books are my two analytical books. Both quantitative in approach. Notice the use of the word “Understanding” in both titles.

American’s Modern Wars cover our analysis of insurgencies and counterinsurgencies based upon an analysis of 89 post-WWII cases. There has been very little quantitative analysis of insurgencies. This is the most extensive effort I am aware of. We were blessed with budget and a staff that at one point included ten people. It is amazing what you can do when you have manpower (read $$$).

War by Numbers is our analysis of conventional warfare. It was built from a series of studies we did over the years for the DOD and other contractors. Probably the most extensive qualitative analysis of aspects of conventional war that has been done in the last few decades. Again, helps to have budget.

These are my two “theoretical” books. I am halfway through a book called More War by Numbers. I have stopped work on it to concentrate on other tasks. May get back to in 2027.

The analysis for America’s Modern Wars was based upon 89 post-WWII insurgencies, interventions and peacekeeping operations. We did expand the database to well over 100 cases but never went back and re-shot the analysis due to budget cuts. It would be my desire to expand the database up to around 120 cases, update the 20 or so that were on-going (our data collection stopped in 2008). and then re-shoot and expand the analysis. This would be a good time to do this instead of again waiting until we are in another insurgency and yet again chasing our tail. Our track record on these have not been good, we lost Vietnam, we lost Afghanistan and Iraq was touch-and-go for a while. While we are not in the middle of another insurgency is a good time to study and learn about them based upon real world experience (AKA history).

Sorry to get preachy, but I really don’t like losing wars.

Afghanistan Casualty estimation Combat Databases Conventional warfare DuWar Databases Estimating Insurgent Force Size Force Ratios Insurgency & Counterinsurgency Iraq Modeling, Simulation & Wargaming Urban Warfare Validation War by Numbers

Europe’s Choice: Military and Economic Scenarios for the War in Ukraine

Christopher A. Lawrence
December 2, 2025

This paper just released by CORISK and the Norwegian Institute of International Affairs (NUPI) is definitely worth taking a look at.

English language version: 2025 Europes choice_FINAL_251125_174147

There are eight references to Dupuy’s work and one to War by Numbers, so it definitely holds our interest. The chapters in the report are:

Military Scenarios and their costs
Introduction
Political analysis
The Scenario
Humanitarian analysis
Military analysis
Economic analysis
Costs and conclusions
Sources
Appendix A – Extended model for calculating combat power
Appendix B – Method for calculating average loss of Russian material

Definitely take a look at this.

P.S. Official link: Publikasjoner

And in Norwegian: To scenarier for krigen i Ukraina: Hva betyr de for Europa – og hva vil det koste? | NUPI

Dupuy's Theory of Combat Eastern Europe Russia War by Numbers

Leavenworth Master’s Thesis on “Forecasting Approaches in Operations Desert Sheild and Desert Storm

In 2020 Major Aaron F. Anderson, a student at the U.S. Army Command and General Staff College in Fort Leavenworth Kansas, published a master’s thesis called “Forecasting Approaches in Operations Desert Sheild and Desert Storm.” It was just sent to me. I was not aware of it even though the author quoted my book War by Numbers extensively. It is referenced 19 times in the paper, so of course, I have a bias towards it. Anyhow a link to the 45-page paper is here: Forecasting Approaches in Operations Desert Shield and Desert Storm

Paper’s abstract:

The Closing of OSD Net Assessment

Turns out that OSD Net Assessment is being closed down. Pete Hegseth shutters Pentagon office that helped military leaders plan for possible future wars and Hegseth ‘disestablishing’ Office of Net Assessment, Pentagon’s strategic analysis specialists – Breaking Defense. Hegseth has instructed DOD to come up with a replacement organization “within 30 days.”

This was a small office in OSD (Office of the Secretary of Defense) that developed legendary status over the years: Andrew Marshall (foreign policy strategist) – Wikipedia

The Dupuy Institute did a number of contracts for Andy Marshall, specifically (see: TDI Reports – The Dupuy Institute)

1. SR-1 Soviet/Russian Influence on Chinese Military Doctrine (Jul. 2003).

2. SA-1: Measuring the Value of Situational Awareness (May 2004)

3. OSD-1: The Applicability of Classical Counterinsurgency Theory to Counterinsurgency Operations (Jan. 2008).

The original Iraq Casualty Estimate (Chapter 1 of America’s Modern Wars) that we did in 2004 was primarily funded by Andy Marshall. He contributed $75K based upon a phone call from Vandiver (CAA) and then CAA chipped in $20K, although CAA ran the project. I did brief Andy Marshall.

The office was funded with about $20 million a year. This supported maybe a dozen people and a budget of $12 or $13 million that he used to pay for various contracts (I accidently saw one of his big omnibus contracts).

He retired in 2015 and an Air Force colonel that I did not know took over. They then issued out a giant omnibus contract which we bid on. They did not contract us.

OSD Net Assessment did an annual “net assessment” of the Soviet Union and Warsaw Pact. Apparently, his last net assessment was done in 1991. After that he focused on a range of issues, including orienting towards China and the RMA (Revolution in Military Affairs). Note that he funded our Situational Awareness report in 2004, which really did not provide overwhelming support for the RMA. It is two chapters in my book War by Numbers and I will be doing a briefing on it on 8 April at the Virtual Connections Conference.

That he was doing lots of analysis but no net assessments became an issue and at some point in the last decade, there were rumors that some of the JCS staff took over the net assessment function. I gather after he retired (he was in his 90s), the new guy was supposed to direct the department back to net assessment. So, I am not sure, but I gather there is now no real department in OSD that is doing net assessment.

The Current Ukrainian Offensive

Christopher A. Lawrence
January 6, 2025

Ukrainian offensives do get my attention because I believe that to negotiate a peace settlement that does not permanently surrender 20% of their country Ukraine will probably need to start retaking some of that ground. They really have not reclaimed any more of their own territory since November 2022.

But they are on the offensive again. Curiously, just before the Trump inauguration. To quote twitter account @timkmak from yesterday (bolding is mine): (1) Tim Mak on X: “Here’s what we are reading today: Ukraine has launched a new offensive in Kursk region, the Russian Defence Ministry said. Ukrainian officials have indicated this is part of a larger operation. This follows territorial setbacks for Ukraine in the Kursk region in recent months. https://t.co/CEMHisnLqv” / X

“Ukraine has launched a new offensive in Kursk region, the Russian Defence Ministry said.

Ukrainian officials have indicated this is part of a larger operation.

The follows territorial setbacks in Ukraine in the Kursk region in recent months.”

Other people are reporting that Ukraine has taken Berdin and has gone 2.7 kilometers past the Russian zero line (Def Mon on X: “Ukrainian forces likely went about 2.7km past the Russian zero line. https://t.co/WDFs2bGxZU” / X and Def Mon on X: “The developments in Kursk oblast looks something like this. We do not know if Ukraine managed to consolidate positions. We think we have geolocated UA units inside Berdin and Novosotnitskii. Geos: https://t.co/RNty0eKLQL https://t.co/ouerMmm9y4” / X).

Reports that this is a significant attack (“AT LEAST a 6 brigade attack): david D. on X: “im tracking about 10 “attacks” by ukr forces around kursk and north Belgorod. keep in mind that some will be real attacks, and some will be feints to draw in russian forces. russians are saying this is AT LEAST a 6 brigade attack… things will be clear later today expect” / X

There are reports of significant Russian losses (which must always be taken with a grain of salt): Chuck Pfarrer | Indications & Warnings | on X: “BURN RATE: In the last 48 hours in Kursk Oblast, the Russian army lost up a battalion of North Korean infantry and VDV paratroopers. Since AUG, Moscow has deployed 50K troops to Kursk Oblast: approximately 38K are assessed as killed, wounded, missing or surrendered.” / X.

Some maps of the area: Chuck Pfarrer | Indications & Warnings | on X: “UKRAINE’S KURSK OFFENSIVE: Latest from the BBC. https://t.co/QLSOk09HmP https://t.co/8xx9goK4kl” / X and Aurora Borealis 🤫 on X: “katsaps report the loss of the village of #Berdin, #Kursk region. https://t.co/QBeVLm9C81” / X and david D. (@secretsqrl123) / X and MAKS 24 🇺🇦👀 on X: “🔼🇺🇦 AFU managed to advance 8 km in the Kursk region, according to Russian voenkors. Map from ISW 🗺️👇👀 https://t.co/ebSfskuV9p” / X.

Anyhow, more to come, but all these reports must be taken with a grain of salt.

The Kursk offensive in August of 2024 was an interesting exercise but fundamentally did not retake any of their own territory and did not take enough of Kursk province to give them a lot they could trade off. It did not fundamentally change the situation on the ground, which is what was needed to give them advantage at the negotiation table. Unconditional surrender is very rare. Most wars end in a negotiated settlement.

The strength and loss figures being reported represent some fraction of reality. I do not know what that is (is it 1/10th or is it 9/10s?). I seriously doubt that the people posting these figures know that either, although some may indicate otherwise.

I was very disappointed in the failed Ukrainian offensive in early June 2023. For the sake of negotiating a positive resolution to the conflict, they really needed to take ground. I thought the Kursk offensive was a good stunt, but only that. Still, they have turned it into an extended fight that may yet yield dividends. If this offensive in Kursk is the start of a series of offensive that extend to Zaporizhzhia, Donetsk and Lugansk provinces, then this could become very significant. We shall see.

A key element in warfare is surprise (I do have a chapter on that in my book War by Numbers). If I can predict what Ukraine is going to do, that is not a good sign, as so to can the Russians. Therefore, if the Ukraine General Staff is doing their job right, they should be taking both Russian and me by surprise. That they appear to be doing.

Eastern Europe Russia War by Numbers

An Old Book Review for War by Numbers

This link below is a book review of War by Numbers published in the Army University Press. It was published in 2017 (the same year the book came out): War by Numbers. It just got forwarded to me by an associate but I have been aware of this favorable review for a while.

Of course, in the real world I get lots of review, some are favorable, some are very unfavorable, and some are in between. I have never published or commented on them for obvious reasons. I have since met some of the reviewers. In this case, I have never met and am not familiar with this reviewer, Frederick A. Baillergeon. What got my attention was that he was out in Fort Leavenworth, Kansas. That is the center of the U.S. Army’s Command and General Staff College (C&GS). This has also traditionally been the center of anti-Dupuy anti-QJM writings, with some senior people there having had an openly hostile relationship with Trevor Dupuy. A number of students there also took exception to the claims made by Trevor Dupuy that the German divisions in Italy in from late 1943 to mid-1944 were more competent (had a higher CEV) than the American and UK divisions. This actually led to a number of books trying dispute this, not that they really succeeded (Dupuy’s claims were based upon data… their refutations were not).

I did get an email a few months ago from a lady apologizing for a negative review of War by Numbers that her brother wrote. She felt it was wrong and written out of animus. Every now and then people do something that make you realize that the vast majority of people are really decent, even if a few “scholars” are not.

Anyhow, this was a nice review by Mr. Baillergeon. It is clear that he knew his subject and had read the book carefully.