Classification is used to differentiate between hazardous munitions and other nonhazardous geology and debris that are detected by sensors used in munitions response. Since digging up harmless items dominates the cost of most MR projects, classification has the potential to support more cost effective use of available resources. SERDP and ESTCP have invested in developing sensors and methods for classification for a decade and recent demonstrations on real-world MR sites have shown great success.