Force protection (FP) describes preventive measures taken by the US military to mitigate hostile actions. The Force Protection Condition (FPCON) system, overseen by the Department of Defense, establishes security levels in response to terrorist threats against military facilities. FPCON has five levels - Normal, Alpha, Bravo, Charlie, and Delta - corresponding to increasing threat levels and necessary security measures. The goal is to determine the minimum security needed based on factors like the predictability of terrorist activity and whether an attack has occurred nearby.