The inflatable tanks stayed behind in the mud, gradually deflating as the gasoline compressors shut down and the air slowly escaped through their seams. The soldiers who had deployed them were already moving forward, following the advance into Germany that their fake army had helped to open.
## Measuring the Ghost Army
Any honest accounting of the Ghost Army must grapple with the limits of what can be known about its operational impact.
The specific documented achievements are real: the Rhine crossing at Viersen with minimal casualties, the German divisions held in the wrong sector, the prisoner interrogations showing that German soldiers did not expect an attack from the west. These are facts, not estimates, and they establish that Operation Viersen accomplished its objectives.
The broader claim — that the 23rd’s operations collectively saved between 15,000 and 30,000 American lives — is an estimate based on analytical projections of what different German behavior would have produced. It is a reasonable estimate, made by people with access to the full operational record and the ability to compare the 23rd’s sectors with adjacent sectors where deception was absent. But it is not a measured figure and should not be treated as one.
What can be said with confidence is that the 23rd Headquarters Special Troops was a genuine operational capability that produced real military effects over twenty months of deployment in the European theater, that its final and largest operation accomplished its specific objective with documented results, and that its methods were innovative enough to influence subsequent development of American military deception doctrine.