This Comprehensive Preparedness Guide, CPG 101, continues the more -than – 50 -year effort to provide guidance about emergency operations planning to State, Local, Territorial, and Tribal Governments. Some predecessor material can be traced back to the 1960s-era Federal Civil Defense Guide. Long-time emergency management practitioners will also recognize the influence of Civil Preparedness Guide 1-8, Guide for the Development of State and Local Emergency Operations Plans, and State and Local Guide (SLG) 101, Guide for All-Hazards Emergency Operations Planning, in this document.