There are three geographical subspecies: Sciurus griseus griseus (central Washington to the western Sierra Nevada in central California); S. g. nigripes (from south of San Francisco Bay to San Luis Obispo County, California; and S. g. anthonyi, which ranges from San Luis Obispo to northern Baja California).
Unity of command is ensuring unity of effort under one responsible person (or commander) for completing a task. This unity of command is one of the twelve principles of joint operations, and is defined as:
COCOM is the command authority over assigned forces. OPCON provides full authority to organize commands and forces and employ those forces. TACON is command authority over assigned or attached forces or commands or military capability or forces made available in tasking.