The California State Guard (CSG) (formerly the California State Military Reserve) is one of three branches of the California Military Department. The CSG is a volunteer force that protects California and its citizens from natural and man-made disasters including: civil unrest, wildfires, floods, earthquakes, and pandemics. The CSG also augments the California Army National Guard and California Air National Guard when they are deployed. Many CSG units are fully integrated with CA Army and Air National Guard units. The CSG has four components: Army, Air, Maritime, and Operations.