## The Captured German Intelligence Reports
One of the challenges in assessing the Ghost Army’s operational effectiveness is the limited availability of German intelligence records from the period.
The German military intelligence system — the Fremde Heere West, or Foreign Armies West, the branch responsible for assessing Allied forces — produced a continuous stream of reports estimating Allied unit positions, strengths, and intentions. These reports would, if they accepted the 23rd’s deceptions, show the impersonated units at the locations the deception intended them to appear. If the reports showed German awareness of the actual situation, the deception had failed.
Some of these German intelligence records survived the war and were eventually captured, translated, and studied by American analysts. The analysis of these records formed part of the basis for the Army’s assessment of the 23rd’s operational effectiveness. The specific finding that at Viersen, German units remained in position opposite the decoy sector even after the actual crossings began, is one piece of evidence from this kind of analysis.
The 30th Division G-2 report noting that no German prisoners expected an attack from the west is another direct piece of evidence: prisoner interrogations are one of the most reliable intelligence sources, and German soldiers who had been told by their own intelligence chain that the main American crossing would come somewhere other than where it actually did would naturally reflect that in their statements.
These specific, documented pieces of evidence provide a firmer foundation for assessing Viersen’s effectiveness than the broader estimates of lives saved, which are projections rather than measurements.