The human factors problem was an essential element in the development of Jeremiah at Lawrence Livermore National Laboratory in the 1980s. Research by Lulejian and Associates had indicated that the individual soldier's assessment of his probability of survival was the key metric in understanding why and when combat units became ineffective. While their research was based on day to day time scales, the developer of Jeremiah, K. E. Froeschner, applied the principle to the 10 second time step of the computer simulation. The result was a high degree of correlation with measured actions for which detailed data were available from a very few after action reports from WWII, the Israeli tank action on the Golan Heights as well as live exercises conducted at Hunter liggett Military Reservation in Monterey, California.