How many DoD- approved FPCON levels are there?

There are four Department of Defense (DoD) approved Force Protection Condition (FPCON) levels: FPCON Normal, FPCON Alpha, FPCON Bravo, FPCON Charlie, and FPCON Delta. Each level indicates the degree of threat to personnel and installations, with Normal being the lowest and Delta reflecting a severe threat. These levels help guide security measures and readiness based on the assessed risk.