Which of the following details is NOT typically included in the information forwarded from military flights to FSS?

The detail that is not typically included in the information forwarded from military flights to Flight Service Stations (FSS) is flight duration. This is because flight duration can vary significantly due to a variety of factors including changes in flight path, weather conditions, and operational requirements. While military flights provide key information such as aircraft ID, original destination, and estimated time of arrival (ETA) to aid in flight coordination and management, the duration of the flight is considered less critical for communication with FSS. This focus allows for more relevant and actionable information to be relayed, ensuring that all parties involved can effectively monitor and assist with the flight's progress as needed.