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The Harping On Ukrainian Manpower Shows How Little Analysts Understand War

Packing the front line with more infantry over the last two years would have made little difference and could have weakened Ukraine

Phillips P. OBrien's avatar
Phillips P. OBrien
Sep 27, 2025
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Hi All,

Franklin Roosevelt was a great war-leader in many respects. One of them is that he had developed a politically and technologically sophisticated understanding of what wins wars and during World War II he was not afraid to tell the US Army to back off to get his way. The US Army, looking at war from its single service perspective, started lobbying for a gargantuan expansion as soon as the Japanese attacked Pearl Harbor. The size of the force they wanted was immense. In early 1942, George Marshall asked for the Army to be raised to 212 divisions—a massive force that would have required so much manpower it would have weakened the other services and deprived the USA of much of its industrial workforce.

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FDR, however, eventually put Marshall firmly in his place. Though Marshall nurtured his big army ideas for the next year and a half, Roosevelt ended up telling him to construct something very different. Roosevelt wanted to preserve much of America’s industrial workforce, saw a large army as a vehicle for mass casualties as much as anything else, and prioritized air and sea power in the defeat of Germany and Japan. In the end, the Army was kept to a level more than half below what George Marshall wanted—the famous 90-division gamble.

Rows of Corsairs being constructed along an assembly line
In World War II, the USA concentrated on this….
1940s Ranks And Files Rows Of World War Two Us Army Infantrymen Marching  Poster Print By Vintage Collection (24 X 36) - Item # PPI176495LARGE -  Posterazzi
not this—and Ukraine has acted likewise.

The result was that the US fought a machine intensive, infantry light war, which crushed the life out of the Axis at a historically small number of American casualties—approximately 400,000 deaths in all theatres and all services. It was a number that represented less than 5 percent of the combined military deaths of the Germans and Japanese, and probably less than 2 percent of Soviet deaths.

I often think FDR does not get the credit he deserves for this.

Btw, I did not footnote this as its a regular part of my research over the last 20 years. You can read much more about all of this in: How the War was Won: Air Sea Power in World War II; The Second Most Powerful Man in the World; and The Strategists.

Also in my just/soon to be released War and Power: Who Wins War and Why, this is a regular theme on war in general from the late 19th century to today.

Fighting wars with machines and fewer soldiers is both strategically and politically (and ethically) a far more effective method than packing out a front line with soldiers. Its also another example of why the western analytic community and US government fails constantly in understanding the best way to fight wars.

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