Gold Standard for Operational Security Breach Analysis: Operation Overlord

This video presents the absolute ceiling for downstream harms that might occur were secure / classified information to fall into enemy hands. The absolute ceiling is the 5000 ships, 1200 aircraft, and 2 million troops that might have been lost had certain information magically appeared in the headquarters of FieldMarshall von Rundstadt, General Rommel, or other.
There is a time-varying value to money, there is a time-varying value to information and therefore there is a time-varying harm that can be directly attributed to any single operational security breach.