The advantages of interlocal mutual assistance agreements in countering and controlling civil disorders are listed. Specifically, mutual fire-protection agreements and police mutual-assistance agreements are discussed. The criteria for effective interlocal mutual assistance agreements are identified as adequate planning, drawn up according to legal requirements, regularized in a formal written agreement, and able to provide for sufficient training. Problems are discussed in the areas of planning, legal authority, and the substance of agreements. State participation in assisting local communities in the control of civil disorders is also considered. Selected 1967 data on intercity mutual assistance agreements are provided for selected cities of over 100,000 population, 500,000 to 1,000,000 population, 250,000 to 500,000 population, and 100,000 to 250,000 population. The discussion of intralocal coordinated planning considers riot control plans, existing organizations and procedures, training programs, and organizational changes, Present cooperative activity and the natural disaster model are examined as well. Problems are discussed for the areas of organization and methods, budgeting and personnel. Selected 1967 data on intracity coordination of activities during civil disorders are provided for the same cities reporting data on intercity mutual assistance agreements. Extensive notes accompany each of the two major sections of the monograph.